TW447223B - Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input - Google Patents
Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input Download PDFInfo
- Publication number
- TW447223B TW447223B TW088117186A TW88117186A TW447223B TW 447223 B TW447223 B TW 447223B TW 088117186 A TW088117186 A TW 088117186A TW 88117186 A TW88117186 A TW 88117186A TW 447223 B TW447223 B TW 447223B
- Authority
- TW
- Taiwan
- Prior art keywords
- signal
- filter
- scope
- patent application
- item
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
Abstract
Description
r 447223 五、發明說明α) 本發明是關於立體聲重現之系統，特別是關於由一單 聲輸入訊號來合成偽立體輸出訊號的系統。 聲音的單聲重現是聲音經由一單一頻道的重現。當一 聲源，例如一樂團的聲音被單聲地錄製並重現時（也就是 藉由一單一的揚聲器重現），所錄製之聲音中之眾多的音 頻及深廣度則在再生重現中漏失。甚至若此單聲錄製的聲 音係經由兩個空間分離的揚聲器來重現時，此樂圑的聲音 仍然是如同基本上由此兩個揚聲器中的某個點所放射出來 的表現一般。 當樂聲是藉由兩個分開的麥克風而被錄製在兩個不同j 的聲道上時，立體聲的重現便會發生。藉由使用一對揚聲 器所成的重現，讓此樂聲不是如同自兩個揚聲器之間的某 一個單一點所發出一般的來表現，而是表現成如同分布並 遍及此兩個揚聲器的平面之後所發出的一般。此一雙執錄 製所提供的此一音域的重現讓一聆聽者得以如同坐落在各 種的聲源中（例如個別的樂器或是歌聲）並能感受到此等 錄製空間或是演奏廳的音響特質。 真實之立體聲的重現是藉由兩個具有不同特質而得以 與單一頻道重現有所區別的頻道所描述□此一第一個特質 是聲源在方向上的分別而使之得以產生寬管度的感知。而一 第二個特質則是縱深度以及因此而產生之臨場的感知。方 向分離的感知曾經被描述成它可以給予此聆聽者去判斷所 選擇的各種聲源的位置，例如在一樂團中的某件樂器的位 置。然而，在另一方面，至於臨場的感知，則是此聲音似r 447223 5. Description of the invention α) The present invention relates to a system for stereo reproduction, and more particularly to a system for synthesizing a pseudo-stereo output signal from a mono input signal. The mono reproduction of sound is the reproduction of sound through a single channel. When a sound source, such as a band's sound, is recorded and reproduced monophonically (that is, reproduced through a single speaker), many of the audio and depth of the recorded sound are lost in reproduction and reproduction. Even if the sound of this mono recording is reproduced through two spatially separated speakers, the sound of the music will still behave as if it were basically radiated from a point in the two speakers. Stereo reproduction occurs when the sound is recorded on two channels with different j through two separate microphones. Through the reproduction of a pair of speakers, the music does not behave as if it were emitted from a single point between the two speakers, but it behaves as if distributed across and spread across the two speakers. Issued generally after. The reproduction of this range provided by this dual recording allows a listener to feel as if it is located in various sound sources (such as individual instruments or singing voices) and can feel the sound of these recording spaces or concert halls Traits. The reproduction of real stereo is described by two channels that have different characteristics and can be distinguished from the reproduction of a single channel. This first characteristic is the difference in the direction of the sound source, which allows it to produce a wide tube. Degree of perception. A second trait is the perception of depth and the resulting presence. The perception of directional separation has been described as giving it to the listener to determine the location of various sound sources of choice, such as the location of an instrument in a band. However, on the other hand, as for the perception of presence, this sound is like
第6頁 器 本 身 所 重 現 卻 是 由 位 在 其 等 後 方 之 位 置 所 發 出 〇 而 者 尺 度 大 小 ) 聲 音 特 質 以 及 -— 名 詞 rr 環 場 氣 氛 述 寬 廣 度 縱 深 度 以 及 臨 場 分 離 被 排 除 之 後 此 名 詞 11 述 寬廣 度 > 縱 深 度 及 臨 場 保 存 了 方 向 分 離 及 環 境 的 雙 重 現 > 也 就 是 習 知 的 偽 立 體 去 重 建 方 向 性 的 立 體 聲 而 的 立 體 聲 所 描 述 的 環 場 氣 氛 重 現 系 統 係 與 一 視 訊 媒 體 * 時 此 兩 個 方 向 分 離 及 環 場 造 了 '— 使 其 如 同 臨 場 於 視 聽 的 感 知 將 會 再 造 此 等 錄 音 間 方 向 上 的 感 知 將 會 創 造 出 各 它 們 的 個 別 的 視 訊 影 像 中 的 由 此 · 環 場 氣 氛 的 感 知 所 產’ 聲 器 的 平 面 之 後 所 發 出 的 - 也 因 此 產 生 〇 若 在 此 兩 個 揚 聲 器 之 間 的 音 可 以 在 聆 聽 者 的 心 中 創 造 _ _ ：r 447223 五、發明說明（2) 乎是臨場般，而沖由此等揚聲 此等揚聲器之間且總是稍稍於 此一臨場的感知則給予此聆聽 錄音位置的縱深度的印象。此 (ambi ence )"曾經被用來描 的感知°換句話說’當方向的 環場氣氛"則是經常被用來描 感。 雙聲道的立體聲音響重現 重特質。經合成的立體聲音響 聲重現，一般來説並不嘗試者 僅僅是重現由真實的兩個頻道 之感知。 當一雙頻道的立體聲音響 例如一電視或是動畫共同使用 氣氛的特質則在此胯聽者上創 情景中的感覺。此一環場氣氛 或是位置之原聲的特質，至於 種不同之聲音表現，就如同由 位置上所發出的一般。此外， 生的聲音似乎是由位在此等揚 般，一特定的三維的立體效果 就合成的立體聲系統來說 頻頻譜被不適當的分割，它也The reproduction of the page 6 device itself is issued by the position behind it, and the scale size) sound characteristics and --- noun rr ring field atmosphere description breadth vertical depth and on-site separation are excluded after the noun 11 The breadth & depth and presence preserves the directional separation and the double reproduction of the environment > that is, the conventional pseudo-stereo to reconstruct the directional stereo and the stereo described by the surround field atmosphere reproduction system and a video medium * At this time, the two directions are separated and the field is created'—making it as if it were present in the audiovisual perception will recreate the perception in the direction of these recording rooms will create a separate image in each of them. The perception of the field atmosphere is produced after the plane of the loudspeaker-and therefore also produced. If the sound between these two speakers can be heard in the listening Creation in the listener's mind _ _: r 447223 V. Description of the invention (2) It is almost on the spot, and the perception that the speaker is between these speakers and always slightly on the spot is given this listening recording position The impression of vertical depth. This (ambience) " perception that has been used to describe ° In other words, 'the ambient atmosphere of the direction' is often used to describe. The two-channel stereo sound reproduces the character. Synthesized stereo sound reproduction is generally not attempted by people who simply reproduce the perception from the real two channels. When a two-channel stereo, such as a TV or an animation, is used together, the characteristics of the atmosphere create the feeling in the scene for the listener. The characteristics of the surrounding field atmosphere or the original sound of the location, as for the different sound performance, are as if emitted from the location. In addition, the sound produced seems to be in this place. A specific three-dimensional stereo effect. In the case of a synthesized stereo system, the frequency spectrum is improperly divided.
第7頁 447223Page 7 447223
五、發明說明（3) 個分布分離 等音響重現 制此聲音訊 果。胯聽者 很容易地在 聲音。因此 而前後徘柄 者一般係較 以，若一特 般來說是較 合成器係使 附加一個非 此聲音得以 一單聲訊號 本發明 訊號以產生 及其他問題 的感知 的揚聲 號之相 係自然 眾多的 ’若有 如此便 無能力 定樂器 不會干 用時間 自然的 表現成 進而產 的具體 一偽立 。此一 到此一係單聲訊號 較少的環場氣氛到 一般來說，此 一單一的輸入頻道 道有更 頻道， 聲揚聲 較此輸入頻 一單聲輪入 左及右立體 0此一 器上， 對的振 地非常 樂器聲 人發出 會讓聆 於一群 所發出 擾到聆 延遲及 環場氣 非自然 生偽立 實施例 體聲訊 訊说處 的音樂 此一係 音響強 生成多 多的環 而此輸 器。 合成的立體聲系統可以藉由在此 用一可聽見的音頻頻譜函數來控 幅及/或相位來獲得所希望的效 熟悉人類所發出的聲音並且可以 中或疋背景嗓音中區別出人類的 之聲音的出現是橫越一個表演場 聽者非常的困惑。相反的，聆聽 樂器中選出一特定的樂器。所 的聲音係橫越表演場而徘徊則— I者。許多的習用技術的立體聲 —他的寬頻帶訊號處理元件，以 氛的感覺到人類的聲音中並造成 地徘彳回於此表演場的方式來處理 體聲訊號。 ，由使用了被設計來處理—單聲 號而以—悅耳的方式解決了這此 理阳Λ β _ 、 17 了相對上較多的環場氣氛 置樂器中’另外則附加了相對上 聲訊號的人類發聲t。 ^的訊號處理可以被用來產生從 /的輸出頻道，使得此輸出頻道 =感:例如，此輸入頻道可以是 %道·可以被放大並被用來驅動V. Description of the invention (3) Distributing the sound and so on.胯 The listener is easily in the sound. Therefore, the back-and-forth person is generally more concerned, if it is generally more than a synthesizer, it is related to the addition of a single signal other than this sound to the signal of the present invention to generate and other problems of perception of the speaker. Naturally, if there is such a thing, there is no ability to set the instrument, and it will not be able to use time to manifest itself naturally and then produce specific falsehoods. From here to here, there is a ring field atmosphere with less single sound signals. Generally speaking, this single input channel has more channels. The sound is louder than the input frequency. A single sound wheel enters the left and right stereos. On the right, the vibration of the ground is very musical, and the sound of the instrument will make listening to a group of music that disturbs the listening delay and the surrounding field. This loser. The synthesized stereo system can use the audible audio spectrum function to control the amplitude and / or phase to obtain the desired effect. Familiar with the human voice and distinguish the human voice from the background voice. Appearance was very confusing for listeners across a performance field. Instead, select a specific instrument from the list of listening instruments. All the sounds traverse the performance arena and hovering-I. Many of the conventional stereo technology-his wideband signal processing element, handles the stereo signals in a way that senses the human voice and causes it to hover back to the performance field. This is solved by using a monophonic signal and a pleasant way to solve this problem. Λ β _ 17, which has a relatively large number of ring-field atmosphere instruments. In addition, a relatively high acoustic signal is added. Human voice t. The signal processing of ^ can be used to generate an output channel from / such that this output channel = sense: for example, this input channel can be% channels. It can be amplified and used to drive
__ 五、發明說明（4) '具艘實施例則 供了較輸入頻道更多 合成器由一單—的輸 波的輪出。此輪入訊 —清晰度濾波器。此 輸出訊號的一等化器 而產生輸出頻道。 〇 此雙頻道合成器 單聲輪入訊號而產生 聲合成器。此一左輸 生’而此右輪出頻道 此合成器可以藉 (〇E>~amps )來建構， 腦中的軟體來達成， 訊說處理器（DSP ). 此合成器相位等 上地與對應於人類聲 的諸等構形頻率，同 一般地被隨意分布的 不要的具人類聲音之 一個立體聲合成器而 時，此相位等化便將 也提供了增加的品質 根據本發明的具 疋 0成器（synthesizer )，它提 的輸出頻道。在一具體實施例中，此 e : I而發出了兩個或是更多個經濾 施加到可產生一差模輸出訊號的 二^訊號則被施加到用來產生一共模 滅波装 ^ 35 °此差模及此共模訊號被合併 : 被用來當作成一個可以自一單一 /¾ 瑪立體聲輸出頻道的一個立體 道係藉由一左頻道組合器所產 ， 則是Ιέ rk 由 精由一右頻道組合器而產生。 用類比組件，例如運算放大器 β者是’此合成器也可以用於一電 好比，你丨^ 例如，一微處理器或是一數位 3 此等輪出使得此等輸出頻道實質 音的一頻率帶，及包括了此人類聲音 相位’ ιχ致當在強化其他的，或是更 聲音訊號的環場氣氛時，可以避免所 環場氣氡。當此合成器被用來當做成’ 自一單聲輸入來產生左及右偽立體聲 此人類聲音定於一表演場的t心並且 的言語聲音的再現。 髖實施例，一寬闊的立體聲影像及聆__ V. Description of the invention (4) 'The embodiment of the ship provides more synthesizers than a single input channel. This round of input — sharpness filter. This output signal is equalized to produce an output channel. 〇 This dual-channel synthesizer generates sound synthesizer by inputting a single sound wheel. This left input student 'and this right turn out channel this synthesizer can be constructed by (〇E > ~ amps), the software in the brain to achieve, the information processor (DSP). This synthesizer phase and the like While the various configuration frequencies corresponding to human sound are generally a stereo synthesizer with undesired human sound that is randomly distributed, this phase equalization will also provide increased quality according to the present invention. A synthesizer, which provides an output channel. In a specific embodiment, this e: I sends two or more filtered signals that are applied to generate a differential mode output signal, and two signals are applied to generate a common-mode annihilation device ^ 35 ° This differential mode and this common mode signal are combined: it is used as a stereo channel that can be produced from a single / ¾-ma stereo output channel by a left channel combiner, but it is A right channel combiner. With analog components, such as the op amp β, the synthesizer can also be used for an electrical analogy. You, for example, a microprocessor or a digital 3, these round-outs make a frequency of the actual sound of these output channels. The band and the phase of the human sound are included to prevent the surrounding field from being discouraged when intensifying the surrounding field atmosphere of other or more acoustic signals. When this synthesizer is used as a 'from a mono input to produce left and right pseudo-stereo sound, this human voice is set at the center of a performance field and the speech sound is reproduced. Hip example, a wide stereo image and listening
447223 五、發明說明（5) 聽區域可藉由自一單聲輸入訊號以選擇性的變化此等單聲 訊號頻率的相對的振幅及相位以及此等合成訊號頻率的相 對振幅而由產生共模及差模訊號而獲得，並合併此等共模 及差模訊號來產生偽立體聲左及右頻道訊號。 要產生此共模訊號，此等單聲訊號之經選定的頻率則 相對於此單聲輸入訊號的其他訊號頻率成分而被增強。更 甚者，此单聲訊遽之經選定的相位成分也相對於此單聲訊 號的其他相位成而被偏移以致於更進一步的定形此共模訊 號。於此所選擇之增強相位偏移而產生的此共模訊號避 了此共模訊號被此差模訊號所壓制。447223 V. Description of the invention (5) The listening area can generate common mode by selectively changing the relative amplitude and phase of the frequencies of these single signals and the relative amplitude of the frequencies of these synthetic signals from a single input signal. And differential mode signals, and combine these common and differential mode signals to generate pseudo-stereo left and right channel signals. To generate this common-mode signal, the selected frequencies of these mono signals are enhanced relative to the other signal frequency components of the mono signal. What's more, the selected phase component of the single audio signal is shifted relative to other phases of the single audio signal, so that the common-mode signal is further shaped. The common mode signal generated by the enhanced phase shift selected here avoids the common mode signal from being suppressed by the differential mode signal.
要產生此差模訊號，此單聲訊號之經選定的頻 則相對於其他的單聲訊號頻率成分而被去加重 U (de-emphasized)。此選擇之增強部分所產生的 訊號用來提供一個寬廣的的立體聲印象以及一寬 差棋 區域。此差模訊號成分的選擇性的強調或增強提ς =聆聽 寬廣的立體聲印象，而相關於此差模訊號的難以辨厂個 耳及印象的偏移則藉由此等化器所提供 別之刺 質上的消除。 而予以實 在差模訊號中的經選定的成分之選擇性 更強化了此立體聲的印象，因為它提供了一 =调或増強 生動但卻總是在錄音時被遮蔽的環境聲立土、起來表5見 如’一個處在具有生動音樂表演之玄二、β晰度。例 體所反射過來的聲音，還有由於此__ 他的物 閉性質的音樂靡;;To generate the differential mode signal, the selected frequency of the mono signal is de-emphasized relative to the frequency components of the other mono signals. The signal produced by the enhanced part of this selection is used to provide a wide stereo impression and a wide chess area. The selective emphasis or enhancement of this differential mode signal component = listening to a wide stereo impression, while the indistinguishable ears and impressions associated with this differential mode signal are differentiated by this equalizer Elimination of thorns. And the selectivity of the selected components in the real differential mode signal reinforces this stereo impression because it provides a tonal or stubborn and vivid but always obscured ambient sound while recording. 5 See, for example, 'One in the second and β clarity with vivid music performance. The sound reflected from the case, and the music of this closed nature due to this __ his object ;;
第10頁 兩個由樂器直接傳送過來的聲音以只a仙^考會聽到访 μ. 从及由牆壁或是其..乂 P^M.7223___ i'發明說明(6) " ----- ，成的回音。然而，在一錄製操作時，此等環境的聲音會. 此等直接傳送的聲音所遮蓋，因而感覺到如同現場表演 殷皆具有相同程度個感覺。然而，此等環境的聲音一般係 j向於此差模訊號之較寧靜的頻率部分，而增強此差模訊 ，的此4較寧靜的頻率便可以去不遮蔽此環境聲音，因此 可以模擬一現場表演的環境聲音的感覺。 〜此差模訊號的選擇性強調，基於以下原因也用來提供 〜寬闊的聆聽區域。此差模訊號的此較大聲響的頻率成分 =向於位在此中間區域的外側，它包括了相對應於人類聲 音的頻率以及一可用來比較於環繞在一聆聽者頭部的耳到V 耳之間的距離的諸波長的諸頻率。由本發明的一具體實施 例所提供的此選擇性強調的結果是，在一驗聽者處之已被 增加相位敏感性的諸頻率的成分係不適宜再被增強。因 此’由於上述之差模訊號的混亂度的增加所導致的此立體 . 聲印象偏移的問題係被實質上地減少，而此餘聽者可·以將 人類聲音定位在此表演場上。 在提供此差分訊號的此選擇性的增強中，此增強的大 小’係由此被選定增強且被混音的差分訊號的音準所決 定’且被設定成讓此被提供的環境感知係相對的調和且悦 耳。 一 本發明的具想實施例也指向單聲唱機錄音的回放，磁 帶，無線電及電視播送，電影聲軌，以及藉使用一傳統聲 音重現系統的數位碟片。本發明的具體實施例係適用於製 · 作任意媒體的偽立體聲錄製，包括，例如唱機錄音，數位 ，On page 10, the two sounds directly transmitted by the instrument are only a cent ^ test will hear the interview μ. From and from the wall or its .. 乂 P ^ M.7223 ___ i'Invention note (6) " --- -, Into the echo. However, during a recording operation, the sound of these environments will be obscured by the sound of these direct transmissions, so that it feels like Yin live has the same degree of feeling. However, the sound of these environments is generally the quieter frequency part of the differential mode signal, and the 4 quieter frequencies that enhance the differential mode signal can not obscure the ambient sound, so it can simulate a The feeling of ambient sound of live performance. ~ The selective emphasis of this differential mode signal is also used to provide ~ a wide listening area for the following reasons. The louder frequency component of the differential-mode signal = towards the outside of the middle region, which includes the frequency corresponding to human sounds and an ear-to-V that can be compared to the ears surrounding a listener's head The frequencies of the wavelengths of the distance between the ears. As a result of this selective emphasis provided by a specific embodiment of the present invention, the components of frequencies at which the phase sensitivity has been increased at a listener are not suitable to be further enhanced. Therefore, the problem of shifting the acoustic impression due to the increase in the degree of chaos of the differential mode signal is substantially reduced, and the remaining listeners can locate the human voice on the performance field. In providing this selective enhancement of the differential signal, the magnitude of the enhancement is 'determined by the pitch of the differential signal selected for enhancement and mixing' and is set to make the provided environmental perception relative Harmonious and pleasing. A contemplated embodiment of the present invention is also directed to playback of mono recorders, magnetic tape, radio and television broadcasts, movie soundtracks, and digital discs using a conventional sound reproduction system. Specific embodiments of the present invention are suitable for making pseudo-stereo recordings of any media, including, for example, phono recording, digital,
第11頁 ΙΐηΑΛΙ 2 2 3 五、發明說明（7) 碟片或是磁帶錄音等，可以在一傳統的聲音重現系統被回 放且產生具有上述之優良效果的左及右立體輸出訊號。 藉由以下的詳細描述以及與之所結合而展列於下的圖 式，於此所揭露之發明的優點及特徵將會很輕易地讓熟習 此等技藝之人士所認同° 第一圖是一單聲錄音及回放系統的方塊圖； 第二圖是一具有一偽立體聲回放系統的一單聲錄音系統的 方塊圖； 第三圖是一音響增強系統的具體實施例的一方塊圖，它使 用全通遽波器而一單一的單聲輸入頻道生成兩個偽立體聲^ 輸出頻道； 第四圖是一音響增強系統的具體實施例的一方塊圖，它使 用清晰度濾波器而將一單一的單聲輸入頻道生成兩個偽立 體聲輸出頻道； 第五圖是一音響增強系統的具體實施例的一方塊圖，它使 用一清晰度濾波器以及一等化器而將一單一的單聲輸入頻 道生成兩個偽立體聲輸出頻道； 第六圖是一個如第五圖所示的音響增強系統的一具體實施 例的一電路示意圖； 第七圖是一清晰度濾波器之轉移函數的一具體實施例圖 」 示； 第八圖是一個與此第七圖所示的清晰度濾波器轉移函數聯 結使用的一帶通濾波器之轉移函數的一具體實施例的圖 示；Page 11 ΙΐηΑΛΙ 2 2 3 V. Description of the Invention (7) A disc or tape recording can be played back in a traditional sound reproduction system and produce left and right stereo output signals with the excellent effects described above. With the following detailed description and the drawings combined with it, the advantages and characteristics of the invention disclosed herein will be easily recognized by those skilled in these skills ° The first picture is a Block diagram of a mono recording and playback system; The second diagram is a block diagram of a mono recording system with a pseudo-stereo playback system; the third diagram is a block diagram of a specific embodiment of a sound enhancement system, which uses All pass through the wave filter and a single mono input channel generates two pseudo-stereo ^ output channels; The fourth figure is a block diagram of a specific embodiment of a sound enhancement system, which uses a sharpness filter to convert a single The mono input channel generates two pseudo-stereo output channels. The fifth figure is a block diagram of a specific embodiment of a sound enhancement system, which uses a sharpness filter and an equalizer to input a single mono input channel. Generate two pseudo-stereo output channels; Figure 6 is a schematic circuit diagram of a specific embodiment of a sound enhancement system as shown in Figure 5; Figure 7 is a sharpness filter FIG embodiment "illustrates a transfer function of a particular embodiment; FIG illustrates a specific example of a band pass filter transfer function of FIG eighth brightness filter is shown a view of a seventh this transfer function used in the embodiment with the junction;
第12頁 447223 五、發明說明（8) 第九圖是一偽立體聲增強系統的左及右頻道輸出的一具體 實施例之圖示； 102 真 實 表 演場 104 單 — 麥 克風（擴 音 器） 106 錄 音 /傳送方塊 107 單 一 ( 單聲）資 訊 系統 108 回 放/接收方塊 110 放 大 器 112 、 212 :揚聲器 114、214 :揚聲器、虛擬的表演場 11 3 :聆聽者 2 0 2、3 0 0、4 0 0、5 0 0 :增強系統 203 低 通 濾 波 器 204 音 頻 處 理 方 塊 206 左 放 大 器 207 右 放 大 器 208 低 音 放 大 器 210 左 揚 聲 器 211 右 揚 聲 器 220 單 聲 輸 入 訊 號 222 左 頻 道 務Γ 出 224 右 頻 道 輸 出 302 左 全 通 濾 波 器 304 右 全 通 濾 波 器Page 12 447223 V. Description of the invention (8) The ninth picture is an illustration of a specific embodiment of the left and right channel output of a pseudo-stereo enhanced system; 102 real performance field 104 single-microphone (megaphone) 106 recording / Transmission block 107 single (monaural) information system 108 playback / reception block 110 amplifier 112, 212: speakers 114, 214: speakers, virtual performance field 11 3: listeners 2 0 2, 3 0 0, 4 0 0, 5 0 0: Enhancement system 203 Low-pass filter 204 Audio processing block 206 Left amplifier 207 Right amplifier 208 Bass amplifier 210 Left speaker 211 Right speaker 220 Mono input signal 222 Left channel service Γ Out 224 Right channel output 302 Left all-pass filtering 304 right all-pass filter
第13頁 ，、厶 4 7 2 2 3 五、發明說明（9) 306 ，312 、314、 3 20 ' 328、 512 、516 加法 器 308 '310 :高通濾波器 309 低通濾波器 316 左頻道輸出 放大器 318 又頻道輸出 放大器 322 326 :組合 器 324 404 、5 0 4 ： 清晰度濾波 器 402 502 、608 : 緩衝放大器 406 '5 14 :反向放大器 506 等化器濾波 器 508 帶通濾波器 510 相位偏移器 602 '610 '611、 614、 615、 617 620 、 621 、 625 、626 636 639 、6 40、 6 43 ' 6 44 ： 電阻 器 603 接地電阻 604 •613 ' 6 34 ' 6 48 ： 接地 1：阻器 609 619 ' 6 27、 6 22 > 6 43 ： 回饋 電阻 器 612 635 、6 3 7 : 電容器 616 641 :接地電容器 618 624 ' 6 28、 6 38 > 6 42 ： 運算 放大 哭 QO 在上 述圖式中，任 一個由三個數字所構 成 的 號 碼的 第 —個 數字 是用來指示此 元件第一次出現的於 某 圖 式 中之 該 一圖 式的 編號。至於具 有四個數字所組成的 參 考 號 碼， 前 面兩 個也 是用來表示圖 式之編號。Page 13, 厶 4 7 2 2 3 V. Description of the invention (9) 306, 312, 314, 3 20 '328, 512, 516 Adder 308'310: High-pass filter 309 Low-pass filter 316 Left channel output Amplifier 318 and channel output amplifier 322 326: combiner 324 404, 504: sharpness filter 402 502, 608: buffer amplifier 406'5 14: inverting amplifier 506 equalizer filter 508 bandpass filter 510 phase Offset 602'610'611, 614, 615, 617 620, 621, 625, 626 636 639, 6 40, 6 43 '6 44: resistor 603 ground resistance 604 • 613' 6 34 '6 48: ground 1 : Resistor 609 619 '6 27, 6 22 > 6 43: Feedback resistor 612 635, 6 3 7: Capacitor 616 641: Ground capacitor 618 624' 6 28, 6 38 > 6 42: Operational amplifier QO at In the above figure, any number consisting of three digits - of this number is used to indicate the element first appears in a certain number of figures in the drawings. As for the reference number consisting of four numbers, the first two numbers are also used to indicate the figure.
第14頁 4472 2 3 五、發明說明（10) 回顧則是首先在 為了要能夠促進對本發明的瞭解，，π…θy 此提出’其中本發明所具有的全部功能將被討論。之後， 本發明將藉由更強調於操作參數而予以更明確的討論。 I. 回顧 B如上所總合的，本發明的一具體實施例包括了 一合成 器用來將一單一的輸入頻道生成兩個或是更多個輪出頻 道，使得此輸出頻道具有較輸入頻道更多的環場氣氛。為 了方便及f"楚地表示，此處的討論所跟隨的假設是此輸入 頻道是一單聲輸入而此合成器提供一左偽立體聲輪出頻道 及一右偽立體聲輸出頻道。然而熟習此等技藝之人士所可 輕易瞭解的是此處的輸入並不需要 具體實施例可以被用在許多的應用中輸：此= 數個輸係藉由以一單—的輸入頻道來生成複 單一ΐ一圖是一單聲錄音及回放系統的一方塊圖，其中一 系统1〇7\風（擴鄉音器）104是用來在—單一（單聲）資訊 =統=7中將音響轉成資訊。誠如此處所使用的，此一用 (information)”可以包括任何的資料表示形 c括那些，例如，電氣訊號，電磁訊 際網路封包’…值，類比或是數位2音先！， 轉以：片Ϊ案中”料，等等。藉由此麥克風1。4所 102上的曰在響係來自一橫跨散佈於一具有深廣度的表演場 牆壁的β音源。由此—麥克風104所轉換的音響也可以是來自 3疋其他（未不出）接近於此表演場102的物件的反Page 14 4472 2 3 V. Description of the invention (10) The first review is to promote the understanding of the present invention, and π ... θy is proposed here, in which all the functions of the present invention will be discussed. Thereafter, the present invention will be discussed more clearly by focusing more on operating parameters. I. Review B. As summarized above, a specific embodiment of the present invention includes a synthesizer for generating a single input channel into two or more rotation channels, so that the output channel has more advantages than the input channel. More ring field atmosphere. For convenience and f " clarification, the discussion here follows the assumption that this input channel is a mono input and the synthesizer provides a left pseudo-stereo turn-out channel and a right pseudo-stereo output channel. However, those skilled in this art can easily understand that the input here does not require specific embodiments and can be used in many applications: this = several inputs are generated by using a single-input channel A single picture is a block diagram of a single sound recording and playback system. One of the systems 107 \ wind (amplifier) 104 is used to-in (single) information = system = 7 will sound Into information. As used herein, "information" can include any data representation including those, for example, electrical signals, electromagnetic Internet packet '... values, analogies, or digital 2 tones !, to : "In the film case," and so on. With this, the sound system on 102 of the microphone 1.4 is from a beta sound source that is spread across the wall of a performance theater with a wide range. From this-the sound converted by the microphone 104 can also be a reflection from 3 疋 other (not shown) objects close to this performance field 102
第15頁 447223 五、發明說明¢11) 射以及來自於環繞者此表演場1 0 2的空間處（未示出）的 回音° 於此資訊流1 0 7的資訊是提供給錄音/傳送方塊1 〇 6。 此傳送方塊1 〇 6提供了資訊流1 0 7到回放/接收方塊1 0 8。此 傳送方塊106代表著任意的適用於儲存或是傳送資訊的元 件或是技術’包括，例如，一無線電/電視傳送器，一光 碟紀錄，一磁性紀錄，一碟片檔案，網際網路等等。同樣 地，此接收方塊1 0 8是用來代表任何適用於接受一出自此 傳送方塊1 〇 6的元件或是技術並將此資訊流1 0 7轉換成一電 氣訊號使之成為一放大器110的輸入β此放大器110的一輸w 出係提供給—揚聲器114。當一聆聽者11 6聽到由此揚聲器 114所重現的音響時，此聆聽者便可感受一虛擬的表演場 114 ° 由於出自於此表演場102的音響係藉由一單一的麥可 風104而被轉換並藉由一單一的揚聲器112而來重現，然而 此一虛擬的表演場11 4則較此真實的表演場1 0 2小很多。此 玲聽者，對應於此具有較小寬廣度或是環境感覺較小的虛 擬表演場1 1 4 ’將會感知到一位於一特定位置的音響印 象。反過來’一個位在接近於此麥克風104的跨聽者，並 聽受由此真貫的表演場102的現场表凉所產生的音響，將w 會感受到因應於此真實表演場102的一個大許多的音響印 象。 第二圖是一相似於第一圖所示之單具有一偽立體聲回 放系統的一單聲錄音系統的方塊圖。在第二圖中，此單—Page 15 447223 V. Description of the invention ¢ 11) Shooting and echoes from the surrounding space (not shown) of the performance field 1 0 2 ° The information in this stream 1 0 7 is provided to the recording / transmission block 1 〇6. This transmitting block 106 provides information stream 107 to playback / receiving block 108. This transmission block 106 represents any component or technology suitable for storing or transmitting information, including, for example, a radio / television transmitter, an optical disc record, a magnetic record, a disc file, the Internet, etc. . Similarly, the receiving block 108 is used to represent any component or technology suitable for receiving a transmission block 106 from this transmitting block and converting this information stream 10 7 into an electrical signal to make it the input of an amplifier 110 β An output w of this amplifier 110 is provided to a speaker 114. When a listener 116 hears the sound reproduced by this speaker 114, the listener can feel a virtual performance field 114 °. Because the sound from this performance field 102 uses a single microphone 104 It is converted and reproduced by a single speaker 112. However, this virtual performance field 114 is much smaller than this real performance field 102. The Ling listener, corresponding to this virtual performance field 1 1 4 ′ having a small breadth or a small environmental feeling, will perceive an acoustic image located at a specific location. In turn, a trans listener who is close to the microphone 104 and listens to the sound generated by the live performance of the true performance field 102, will feel w corresponding to this real performance field 102. A much bigger acoustic impression. The second figure is a block diagram of a mono recording system having a pseudo-stereo playback system similar to that shown in the first figure. In the second picture, this order—
第16頁 447223 五、發明說明（12) 麥克風104是用來將此單一（單聲）資訊流1〇7中的音響轉 變成資訊。誠如第一圖所示，由此麥克風104所轉換的音 響係來自一橫跨散佈於一具有深廣度的表演場1〇2上的音 源’或是來自於牆壁或疋其他物件的反射，或是於此室内 之空間的回音。於此資訊流1 〇 7上的資訊是用來提供給一 錄音/傳送方塊1 0 6。此傳送方塊1 〇 6提供了資訊流丨〇 7給一 回放/接收方塊108。 此接收元件108提供了單聲資訊1〇2給一增強系統2〇2 的一第一輸入及一低通遽波器203的一輸入。此增強系統 202提供了一左頻道偽立體聲輸出及一右頻道偽立體聲輸— 出到一音頻處理方塊204。此音頻處理方塊2〇4可以提供進 一步的音頻增強，例如音調控制，平衡控制等等。此音頻 處理方塊204提供了 一左頻道輸出給一左放大器206及一右 頻道輸出給一右放大器207。此音頻處理方塊2〇4係非強制 使用且可予以去除的，於此情況下由此増強系統2 〇 2所出 的此左及右頻道輸出則分別地直接提供給左及右放大器 206及207。此左放大器206的一輸出則傳送到一左揚聲器 而此一放大器207的一輸出則被提供給一右揚聲器。 此低通j慮波β 2 0 3的一輸出則用來當作一低音放大 208的一輸入而此低音放大器208的一輸出則提供給一揚聲w 器212。此低通濾波器203，此低音放大器2〇8，及此揚聲 器21 2則是非強制必要而且是可省略的此跨聽者1 1 6聽到 由此揚聲器2 10-212所重現的聲音，並感受到一虛擬的表 演場214。Page 16 447223 V. Description of the invention (12) The microphone 104 is used to convert the sound in the single (mono) information stream 107 into information. As shown in the first picture, the sound converted by this microphone 104 comes from a sound source 'spanning across a deep-range performance field 10' or reflections from walls or other objects, or It is the echo of the space in this room. The information in this information stream 107 is used to provide a recording / transmission block 106. This transmitting block 106 provides a stream of information to a playback / receiving block 108. The receiving component 108 provides a single sound information 102 to a first input of an enhancement system 202 and an input of a low-pass chord 203. The enhancement system 202 provides a left channel pseudo stereo output and a right channel pseudo stereo output—to an audio processing block 204. This audio processing block 204 can provide further audio enhancement, such as tone control, balance control, and so on. The audio processing block 204 provides a left channel output to a left amplifier 206 and a right channel output to a right amplifier 207. The audio processing block 204 is optional and can be removed. In this case, the left and right channel outputs from the stubborn system 2 02 are directly provided to the left and right amplifiers 206 and 207, respectively. . An output of the left amplifier 206 is transmitted to a left speaker, and an output of the amplifier 207 is provided to a right speaker. An output of the low-pass filter 203 is used as an input of a bass amplifier 208, and an output of the bass amplifier 208 is provided to a speaker 212. The low-pass filter 203, the bass amplifier 20, and the speaker 21 2 are optional and can be omitted. The trans-listener 1 1 6 hears the sound reproduced by the speaker 2 10-212, and Feel a virtual performance field 214.
第17頁 Λ47223 五、發明說明（13) 此增強系統2 0 2可以使用類比訊號處理，數位訊號處 理’或是此等之組合來完成。此增強系統2〇2也可以使用 在一電腦處理器’例如，英特爾公司的pentiura處理器或 是它的新型號產品上的軟體來達成。此增強系統2〇2也可 以由使用在一數位訊號處理器（DSp )上的—軟體程式來 達成。 此立體增強系統202可以很容易的被併入一製作來以 一分離單元販賣的音頻前置放大器來生產，也可以被併入 一被包括在一整合的放大器及接收器的音頻前置放大器 要與一已標準且可資利用的商品化了的音頻構件一起 使用’此立體增強系統2 〇 2的一具體實施例可以被利用在 個錄影帶監視器環路（the tape monitor loop)，若 可以的話’也可以在一前置放大器的一外部處理器環路。 此等環路係不受此前置放大器的控制，例如，音調控制， 平衡控制’以及音量控制所影響。或者，此立體增強系統 20 2也可以被安置在此前置放大器及一標準的立體聲音響 重現系統的功率放大器之間。 誠如眾所週知的，一立體聲音響重現系統係嘗試者去 產生一音響印象，其間此被重現的聲音則被感覺成是由橫^ 越此表演場214不同的位置處所發出的一般，因而模擬出 一生動的表演場1〇2的感受。此一立體聲音印象之聽覺上 的幻覺一般係以位在左及右揚聲器21〇及211之間而被感 知’而此立體聲印象的寬廣度則與一位在此個別的被提供Page 17 Λ47223 V. Description of the invention (13) This enhanced system 2 0 2 can be completed by analog signal processing, digital signal processing 'or a combination of these. This enhanced system 202 can also be implemented using software on a computer processor ', such as Intel's Pentiura processor or its newer model. The enhanced system 202 can also be implemented by a software program on a digital signal processor (DSp). The stereo enhancement system 202 can be easily incorporated into a production to produce an audio preamp sold as a separate unit, or it can be incorporated into an audio preamp included in an integrated amplifier and receiver. Use with a standard and available commercial audio component 'A specific embodiment of this stereo enhancement system 202 can be used in the tape monitor loop, if available The words' can also be an external processor loop in a preamp. These loops are not affected by the control of the preamplifier, such as tone control, balance control 'and volume control. Alternatively, the stereo enhancement system 202 can be placed between the preamplifier and the power amplifier of a standard stereo reproduction system. As is well known, a stereo sound reproduction system is an attempt to generate an acoustic impression, during which the reproduced sound is felt as if it were emitted from different locations across the performance field 214, so the simulation Feel the feeling of a lively performance at 102. The auditory hallucinations of this stereo sound impression are generally perceived by being located between the left and right speakers 21o and 211 ’, and the breadth of this stereo impression is provided separately from one here
第18頁 Λ47223 五、發明說明（14) 給此左及右揚聲器210及211之相似的或是不相似的資訊之 間的一寬大的範圍有關。若提供給任一個揚聲器的資訊是 相同了 C例如’單聲）那麼此音響印象便主要是落在此等 揚聲器之中間段處。相反的’若提供給任一揚聲器的資訊 是不同的’那麼音響印象的範圍便會散布在這兩個揚聲器 之間。 此立體聲印象的寬廣度並不僅與提供給此等揚聲器之 資訊有關’也與聆聽者的所在的位置有關 理想上，此跨 聽者係與此等揚聲器間有相同的距離◎對具有許多揚聲器 的系統而言’當此聆聽者愈靠近到某一揚聲器時，由較遠j 處的揚聲器所發處的聲音便貢獻出較少的立體聲印象，而 且此音響會非常快的被感受成僅由此最接近的揚聲器所發 出。所以當任一個揚聲器中的資訊是相似之時這是非常特 殊之處。因此’此增強系統提供了它們之間是非常不相似 的左及右頻道。 此增強系統2 02將此單聲輸入訊號220轉變成左及右輸 出偽立體聲訊號’它具有藉直接的提供此單聲訊號22〇到 此等放大器206及2 07所獲得者來說具有更多的環場氣氛。 已經有許多的習知技藝嘗試著將環場氣氛，以混音的結果 來附加到單聲訊號中。相對來說，此聲音增強系統2〇2的J 優勢在於生成一個差模訊號（differential-mode signal )’那是一個類比對一差分訊號（anal〇gOUS to a difference signal (L-R))。部分的差模訊號相對於其 他被去加重的差模訊號的部分而被強調（增強）。Page 18 Λ47223 V. Description of the invention (14) A wide range between similar or dissimilar information of the left and right speakers 210 and 211 is related. If the information provided to any of the speakers is the same C (e.g., 'mono'), then the acoustic impression mainly lies in the middle section of these speakers. On the contrary, 'if the information provided to either speaker is different', then the range of acoustic impressions will be spread between the two speakers. The breadth of this stereo impression is not only related to the information provided to these speakers, but also to the location of the listener. Ideally, this trans-listener is the same distance from these speakers. Systemically, 'When the listener gets closer to a certain speaker, the sound from the speaker at a further distance j contributes less stereo impression, and the sound will be felt very quickly only by this Closest speaker. So it's very special when the information in any speaker is similar. So 'this enhanced system provides left and right channels that are very dissimilar. This enhanced system 2 02 converts this mono input signal 220 into left and right output pseudo-stereo signals. It has more advantages for those who obtain this mono signal 22 to these amplifiers 206 and 2007. Ring atmosphere. Many conventional techniques have attempted to attach the ring atmosphere to the mono signal as a result of mixing. Relatively speaking, the J advantage of this sound enhancement system 202 is that it generates a differential-mode signal, which is an analog to a difference signal (L-R). Part of the differential mode signal is emphasized (enhanced) relative to other parts of the de-emphasized differential mode signal.
第19頁 447223 五、發明說明U5)Page 19 447223 V. Description of Invention U5)
第三圖所示是一個增強系統2 0 2的一具體實施例，它 使用了一左全通濾波器302及一右全通濾波器304將一環場 氣氛附加到一單聲輸入訊號Μ 2 2 0。此訊號Μ是提供給此左 全通濾波器3 0 2及此右全通濾波器3 0 4。此左全通滤波器 302是一個相位領先濾波器用來產生一正45度的領先相位 偏移。此右全通濾波器3 0 4是一個相位落後濾波器它用來 產生一負4 5的的落後相位偏移。 此濾波器302的一輸出被當作一加法器320的一第一輸 入以及一組合器3 2 2的一非反向（相加）輸入。此濾波器 3 0 4的一輸出係被提供給此加法器3 2 0的一第二輸入以及此一 組合器322的一反向（相減）輸入β此加法器320的一輸出 被用來當作一加法器328的一第一輸入β此組合器3 22的輸 出則被用作一组合器326的一非反向輸入。 此濾波器3 0 4的輸出也被當成是一清晰度濾波器3 2 4的 一輸入。此清晰度濾波器3 2 4的一輸出被用作是此組合器 3 2 6的一反向輸出以及此加法器3 2 8的一第二輸入。此濾波 器302的輸出也被用來當作是此加法器328的一第三輸入以 及此組合器326的一非反向輸入。 此加法器3 2 8的一輸出被用來提供給一高通濾波器3 2 8 以及一加法器306的一第一輸入。此組合器326的一輸出被一 提供給一高通濾波器31 0及此加法器3 0 6的一第二輸入。此 加法器306的一輸出則係提供給一低通濾波器30 9。 此高通濾波器308的一輸出被用來當作一加法器31 2的The third figure shows a specific embodiment of an enhancement system 202, which uses a left all-pass filter 302 and a right all-pass filter 304 to add a ring field atmosphere to a mono input signal M 2 2 0. The signal M is provided to the left all-pass filter 3 0 2 and the right all-pass filter 3 0 4. The left all-pass filter 302 is a phase leading filter used to generate a leading phase offset of 45 degrees. The right all-pass filter 3 0 4 is a phase backward filter which is used to generate a negative phase offset of 4 5. An output of this filter 302 is taken as a first input of an adder 320 and a non-inverted (additive) input of a combiner 3 2 2. An output of the filter 3 0 4 is provided to a second input of the adder 3 2 0 and an inverting (subtraction) input of the combiner 322 β. An output of the adder 320 is used As a first input β of an adder 328, the output of this combiner 322 is used as a non-inverting input of a combiner 326. The output of this filter 3 0 4 is also regarded as an input of a sharpness filter 3 2 4. An output of the sharpness filter 3 2 4 is used as a reverse output of the combiner 3 2 6 and a second input of the adder 3 2 8. The output of the filter 302 is also used as a third input of the adder 328 and a non-inverting input of the combiner 326. An output of the adder 3 2 8 is used to provide a high-pass filter 3 2 8 and a first input of an adder 306. An output of the combiner 326 is provided to a high-pass filter 3 0 and a second input of the adder 3 0 6. An output of the adder 306 is supplied to a low-pass filter 309. An output of this high-pass filter 308 is used as an adder 31 2
447223 五、發明說明（16) 法器31 2的一第二輸入。此加法器31 2的一輸出被提供給一 左頻道輸出放大器316的一輸入而此左頻道輸出放大器316 的一輸出則被用來提供一左頻道輸出。 一高通濾波器310的輸出被用來當作一加法器314的一 第一輸入而此低通濾波器3 0 9的一輸出則被當作此加法器 31 4的一第二輸入。此加法器3 1 4的一輸出係被用來當作一 右頻道輸出放大器318的一輸入而此放大器316的一輸出則 被用作是一右頻道輸出。 此增強系統30 0藉使用此全通濾波器302, 304而引入橫 跨整個音頻頻譜的相位偏移來產生左及右偽立體聲輸出。d 由此加法器3 0 6所提供的一左加右（L + R )訊號的低頻部份 分別藉由此加法器312及314而與此等左及右頻道混音。高 於低通/慮波器309的哀減頻率（r〇ii〇ff frequenCy)以上 的頻率’非常少量的L + R頻率被附加到此左及右頻道上。 因此，位在高於此低通濾波器3〇9之上的頻率，此左及右 頻道基本上是九十度的相位差（也就是約分隔九十度）。 在低於此低通濾波器3 0 9之衰減頻率之下的低頻處，一些 L + R訊號則被附加到此等左及右頻道。因此，在未遠於^ 此低通濾波器30 9處用來移除的截除頻率處的低頻部份， 此等左及右頻道的分隔均小於九十度。在非常低的頻率’ 處’此高通遽波器308及310則衰減了大多數的右及左頻道 ΐ ΐ 此等左及右輸出訊號係主要地由被提供在此低通 遽^ 3 0 9的輸出上的（L + R)所驅動。因此，在非常低頻 率處，此等左及右輸出訊號其實質上係同相位。 447223 _ 五、發明說明（17) ' 如第三圖所示的此增強系統3 0 0提供了一單聲輪入a 號的偽立體聲強化，但卻會在對應於人類聲音的頻率範3 部份產生太多的環場氣氛，而在高於或低於人類聲a 帶處之頻率範圍中產生太少的環場氣氛。 差分訊號的無選擇性的增加會造成問題，因為此差八 訊號之較強的頻率成分傾向於被集令在包含有人類聲立习 中間區域的頻率處。在習用技藝中所發現的一個問題是之 由於人類耳朵對於處於中間區域中之約在7 0 0赫茲到約^ ^ 000赫茲的範圍非常的敏感’而使此被重現的聲音非常的 刺耳且讓人煩躁。在這些頻率處，此跨聽者頭部位置的一 輕微的移動便會造成一立體聲印象中的一個不適的飄移。"^ 第四圖是一音響增強系統400的一方塊圖，在對應於 人類聲音的頻率範圍處它提供了相對上較低的環場氣"氛'， 而在其他的頻率範圍處則提供了相對上較多的環場氣氛。 在此一增強系統400令’此單聲輸入訊號M200係經由一緩 衝放大器402所提供而被用作是一清晰度濾波器4〇4的一輸 入。此清晰度濾波器4 0 4的一輸出係被用來提供給一第一 輸出頻道（L_R)及一具有單位增益的一反向放大器4〇6的 一輸入。此放大器406提供了一 18〇度的相位偏移。此放大 器406的輸出則被提供給一第二輸出頻道H )。 一 此清晰度遽波器4 0 4用來去加重了位在對應到人類聲 音（中帶）的頻率範圍處的此單聲輸入220的頻率成分。 因此，此等第一及第二輸出頻道係在對應於此中帶處的頻 率範圍中被衰減。然而，此等輸出係仍然與此十帶有丨8 〇447223 V. Description of the invention (16) A second input of the instrument 31 2. An output of the adder 31 2 is provided to an input of a left channel output amplifier 316 and an output of the left channel output amplifier 316 is used to provide a left channel output. An output of a high-pass filter 310 is used as a first input of an adder 314 and an output of the low-pass filter 309 is used as a second input of the adder 314. An output of the adder 3 1 4 is used as an input of a right channel output amplifier 318 and an output of the amplifier 316 is used as a right channel output. The enhancement system 300 uses the all-pass filters 302, 304 to introduce a phase offset across the entire audio spectrum to produce left and right pseudo-stereo outputs. d The low frequency portion of a left plus right (L + R) signal provided by this adder 3 0 6 is mixed with these left and right channels by this adder 312 and 314, respectively. Frequencies above the frequency of the low pass / wave filter 309 (r0iiff frequenCy) are very small, and L + R frequencies are added to the left and right channels. Therefore, at frequencies above the low pass filter 309, the left and right channels are essentially ninety degrees out of phase (that is, approximately ninety degrees apart). At low frequencies below the attenuation frequency of the low-pass filter 309, some L + R signals are added to these left and right channels. Therefore, the separation of the left and right channels is less than ninety degrees in the low-frequency portion at the cut-off frequency that is not farther than ^ this low-pass filter 30 9. At very low frequencies, the high-pass chirpers 308 and 310 attenuate most of the right and left channels. Ϊ́ These left and right output signals are mainly provided by the low-pass 遽 3 0 9 (L + R) on the output. Therefore, at very low frequencies, these left and right output signals are essentially in phase. 447223 _ V. Description of the invention (17) 'As shown in the third picture, this augmentation system 3 0 0 provides a single sound wheel into the pseudo-stereo enhancement of number a, but it will be in the frequency range corresponding to human voice 3 The component produces too much ring field atmosphere, and too little ring field atmosphere in the frequency range above or below the human a-band. The non-selective increase of the differential signal can cause problems because the stronger frequency components of the differential signal tend to be concentrated at frequencies that include the middle region of the human voice. One problem found in conventional techniques is that the sound reproduced is very harsh because the human ear is very sensitive to the range of about 700 Hz to about ^ ^ 000 Hz in the middle region. Annoying. At these frequencies, a slight movement of the listener's head position can cause an uncomfortable drift in a stereo impression. " ^ The fourth figure is a block diagram of a sound enhancement system 400, which provides a relatively low ring field gas at the frequency range corresponding to human sounds, and at other frequency ranges, Provides a relatively more ambient atmosphere. Here, an enhancement system 400 causes the 'mono input signal M200 to be used as an input of a sharpness filter 404 through a buffer amplifier 402. An output of the sharpness filter 400 is used to provide an input of a first output channel (L_R) and an inverting amplifier 406 with unity gain. This amplifier 406 provides a phase shift of 180 degrees. The output of this amplifier 406 is provided to a second output channel H). -The sharpness waver 4 0 4 is used to de-emphasize the frequency component of the mono input 220 located in the frequency range corresponding to the human voice (mid band). Therefore, these first and second output channels are attenuated in a frequency range corresponding to the middle band. However, these outputs are still with this 丨 8 〇
第22頁 447223 - 一 五、發明說明（18) 度的相位偏離而且此增強系統的頻率響應係非均勻的（爭 整）。一較佳的增強系統將會在輸出的頻率響應上提供較 佳的均勻性，而且此等輸出將會接近於與此中帶同相位° 第五圖是一音響增強系統500的方塊圖，它提供了較 均勻的頻率響應及與橫跨此中帶頻率接近於同相位的輸 出。此系統5 0 0使用了一清晰度濾波器504及等化器506而 自一單一的單聲輸入頻道來產生兩個偽立體聲輸出頻道。 在此系統500中，此單聲輸入M20 0係被用來提供給一緩衝 放大器502。此放大器50 2的輸出則被當作是此清晰度濾波 器504的一輸入以及一帶通濾波器508的一輸入。此清晰度一 遽波器5 0 4的一輸出則被用作一加法器5 1 2的一第一輸入， 以及一反向放大器514的一輸入。此反向加法器514的一輸 出則用作是一加法器5 1 6的一第一輸入。 此帶通濾波器508的一輸出被提供給一90度相位偏移 器510的一輸入。此相位偏移器510的一輸入則被用作是此 加法器512的一第二輸入以及加法器516的一第二輸入。加 法器512的一輸出是一左頻道輸出222，而加法器516的一 輸出是一右頻道輸出224的一輸出。 此清晰度濾波器的輪出是一個差模訊號 (dif f =rent ial i〇de s ignal )。在一具體實施例中，此— 差模訊號讓耳朵具有較大的敏感性的此等頻率（約4 〇 〇赫 茲到1 0 ’ 〇 0 0赫茲，而較佳的是約在7 0 0赫茲到7 0 0 0赫茲） 未被不適切地強化，而因此使得此具有可與位在一聆聽者 的耳朵之間的距離相比較之波長的此差分訊號Page 22 447223-One. V. Description of the invention (18) The phase deviation is 18 degrees and the frequency response of this enhanced system is non-uniform (contention). A better enhancement system will provide better uniformity in the frequency response of the output, and these outputs will be close to the same phase as this. The fifth figure is a block diagram of a sound enhancement system 500. Provides a more uniform frequency response and an output that is close to the same phase as the frequency across this mid-band. This system 500 uses a sharpness filter 504 and an equalizer 506 to generate two pseudo-stereo output channels from a single mono input channel. In this system 500, the mono input M20 0 is used to provide a buffer amplifier 502. The output of the amplifier 502 is taken as an input of the sharpness filter 504 and an input of a band-pass filter 508. An output of the sharpness-wavelet 504 is used as a first input of an adder 5 12 and an input of an inverting amplifier 514. An output of the inverse adder 514 is used as a first input of an adder 5 1 6. An output of this band-pass filter 508 is supplied to an input of a 90-degree phase shifter 510. An input of the phase shifter 510 is used as a second input of the adder 512 and a second input of the adder 516. An output of the adder 512 is a left channel output 222, and an output of the adder 516 is an output of a right channel output 224. The rotation of this sharpness filter is a differential mode signal (dif f = rent ial i〇de signal). In a specific embodiment, this—differential mode signals allow the ears to have greater sensitivity to these frequencies (about 4,000 Hz to 100 Hz), and more preferably about 700 Hz To 7 0 0 Hz) This differential signal is not unduly strengthened, and thus makes this have a wavelength comparable to the distance between the ears of a listener
447223 五、發明說明（19) (difference signal)成分未被不適當地強化。 由此清晰度濾波器5 0 4所提供的此差模訊號，在某些 方面，是一個偽差分訊號C卜R )。此清晰度濾波器5 0 4以 一頻率的函數來選擇性地衰減此差模訊號。一清晰度濾波 器之轉移函數的一個具體實施例則誠如第七圖所示。如圖 所示’此差模訊號在約為400赫茲到約為〇Q〇赫茲的中 帶頻率範圍係特別地被衰減’而更特定的部份是在約為 700赫茲到約為7， 〇〇〇赫茲。人類耳朵之所以對t帶頻率 有較大的敏感性，部份是由於此頻率範圍包括具有可與胯 聽者之耳朵間之距離相比較之波長的差分訊號成分。在t 帶頻率範圍的衰減約為2到15分貝。 如則面之相對於習知技藝所述的，不具有此等頻率的 大音量的差分訊號造成了讓人焦躁不安的尖銳嗓音並且限 疋了一驗聽者必須坐落在與此兩個揚聲器之間的皆相同的 距離上。藉由衰減此等頻率，此尖銳聲以及位置上的限制 皆被實質上地減少。此中帶衰減係部份地補償使之增加人 類耳朵對位在中帶區域之音響的敏感性。人類耳朵的外部 會將坐落在聽眾前方的音源所發出的聲音予以衰減β在内 耳導管中的共振會增加對中帶區域聲音的敏感性，因此内 耳可以補償外耳。内耳及外耳之間的交互作用可以部份地 解釋此前置相關轉移函數（jjead Related Transfer Function: HRTF )的物理觀點。此清晰度濾波器的_帶衰 減提供了 一個類似於一 HRTF的效應，也就是它可以補償位 在内耳及外耳之間的交互作用。447223 5. Description of the invention (19) The component of the difference signal has not been improperly strengthened. The differential-mode signal provided by this sharpness filter 504 is, in some respects, a pseudo-differential signal C B R). The sharpness filter 5 0 4 selectively attenuates the differential mode signal as a function of frequency. A specific embodiment of the transfer function of a sharpness filter is shown in Figure 7. As shown in the figure, 'This differential mode signal is particularly attenuated in the mid-band frequency range of about 400 Hz to about 0 Hz.' The more specific part is about 700 Hz to about 7, 0. 〇〇Hz. The reason why the human ear has greater sensitivity to the t-band frequency is partly because this frequency range includes a differential signal component having a wavelength comparable to the distance between the ears of the listener. The attenuation in the t-band frequency range is approximately 2 to 15 dB. As mentioned above, with respect to the conventional art, the large-volume differential signal without these frequencies creates a disturbingly sharp voice and restricts the listener from having to sit between these two speakers. Are all on the same distance. By attenuating these frequencies, the sharpness and positional restrictions are substantially reduced. This mid-band attenuation is partly compensated to increase the sensitivity of the human ear to the sound in the mid-band region. The outside of the human ear attenuates the sound from a sound source located in front of the listener β. Resonance in the inner ear canal increases sensitivity to sounds in the middle zone, so the inner ear can compensate for the outer ear. The interaction between the inner ear and the outer ear can partially explain the physical view of this pre-related transfer function (HRTF). The _band attenuation of this sharpness filter provides an HRTF-like effect, that is, it can compensate for the interaction between the inner and outer ears.
第24頁 447223 五、發明說明（20) 一等化器濾波器5 0 6包括了此帶通濾波器5 0 8以及一提 供了一共模訊號來互補此差模訊號的相位偏移器510。而 此帶通濾波器5 0 8的此一適當的等化特性則誠如第八圖所 示。於此具體實施例中，此帶通濾波器5 0 8在趨近7 0 0赫茲 及7，000赫茲附近具有一 -3分貝頻率’並以每十單位約 2 0分貝的大小衰減。此帶通濾波器的6, 3 0 0赫茲的帶寬逼 近了人類聲音的運作範圍。在其他的具體實施例中，此一 下-3分貝頻率可以在400赫茲到2， 000赫茲的範圍之内， 而上-3分貝頻率則是在3， 000赫茲到10， 000赫茲的範圍 之内。此偏移器51 0會將此帶通濾波器5 0 8的輸出相對於此 濾波器504的輸出偏移約90度《此90度的偏移大約將此共 模訊號定位在濾波器504的〇度相位輸出及此反向放大器 5 1 4的1 80度相位輸出的中間。因此’此共模訊號與位在此 清晰度濾波器50 4的輸出上的差模訊號以及位在放大器514 的輸出上的此反向差模訊號等兩者在相位上是約略等距 的。易&之，此共模訊號的相&，相對於此反向及正常的 差模訊號而5疋大約平衡的。 此清晰度濾波器的濾浊蝕必 ^ ^ , ^ ^ 夜轉移函數可以一所需而被設計 成在低於约3 0 0赫钍時以每八立 9度（octave )約6分貝或是 更多的比率C未不出）衰減表 包括了如第二圖所示的此：=免過度被強調的低音。當 率衰減是有特別的需要的。低音揚聲器212時如此低的頻 由此清晰度遽波器所居车 偽立體聲輸出中’貢獻了此環？此差模訊號，1要是在此 展％氣氛。所以，此差模訊號Page 24 447223 5. Description of the invention (20) The equalizer filter 506 includes the band-pass filter 508 and a phase shifter 510 that provides a common-mode signal to complement the differential-mode signal. The appropriate equalization characteristic of the band-pass filter 508 is as shown in the eighth figure. In this specific embodiment, the band-pass filter 508 has a frequency of -3 dB in the vicinity of 700 Hz and 7,000 Hz, and is attenuated by about 20 dB per ten units. The 6,300 Hz bandwidth of this band-pass filter approaches the operating range of human sound. In other specific embodiments, the frequency of -3 dB may be in the range of 400 Hz to 2,000 Hz, while the frequency of -3 dB may be in the range of 3,000 Hz to 10,000 Hz. . The shifter 51 0 will shift the output of this band-pass filter 5 0 8 relative to the output of this filter 504 by about 90 degrees. This 90 degree offset will roughly position this common mode signal at the filter 504. 0 degree phase output is in the middle of the 180 degree phase output of this inverting amplifier 5 1 4. Therefore, the common mode signal and the differential mode signal on the output of the sharpness filter 504 and the reverse differential mode signal on the output of the amplifier 514 are both approximately equidistant in phase. It is easy to & the phase & of this common mode signal is approximately balanced with respect to the reverse and normal differential mode signals. The turbidity of this sharpness filter must be ^ ^, ^ ^ The night transfer function can be designed as needed to be approximately 6 dB at 9 degrees per octave or below 30 Hz. More ratio C is not shown) The attenuation table includes this as shown in the second figure: = to avoid excessively emphasized bass. There is a special need for rate decay. The low frequency of the woofer 212 is such a contribution to this loop in the pseudo-stereo output of the car in which the sharpness wave filter resides? If this differential mode signal is used, 1% of the atmosphere will be developed. So, this differential mode signal
第25 頁 Λ47223 五、發明說明（21) 在此中帶頻率 ,^ ^ 卸*圍中的成分則相對於位在此中帶頻率之外 的頻率範圍成分· 1 ^ ^ L ^ ., 而被攻減。如此具有在此中帶頻率中產生 較少的環場氣汽& + β I而在其他的頻率範圍則產生較多的環場氣 氣之成致。較佶沾a Α μ & + , &的瓦’在此中間範圍的此差模訊號成分相 對於在此中間笳阁 和*圍的任一·邊的差模訊號成分約衰減8分 貝。由此等化装&立， ta ^ 35所產生的此共模訊號則提供了極少或不提 供環％軋氛。闵仏 丄 ,y. ^ u此’在此中帶頻率範圍内的此共模訊號的 成分便相對於奚# # . I他的頻率範圍而被增強使得當此差模訊號 Μ二號破合併時’讓位在中帶頻率範圍之外的此合成 的訊J具有，多的環場氣氛。 、者於山λ 疋如第五圖所示的此音響增強系統的左及右頻 道輸出的一 ysr圖。苐九圖所示的繪圖在X轴上的頻率以 ϊίι/的振幅（分貝）。在-具體實施例中，此等左 絲#从&係實質上地共相位以及實質上地在一接近1，1 00 赫纽的跨赖艇走 f 質 _ 平QCr〇ss-〇ver frequency)上在振幅上本 5()8 μ相同的。此跨越頻率約略的對應到此帶通濾波器 、中間頻率以及此清晰度濾波器5 0 4的中間頻率《在其 的具體實施例中’此跨越頻率可以落在約為5 0 0赫茲到 ’ 〇〇〇赫兹的範圍内。而另外的具體實施例中，此等左及 右頻道在此跨越頻率上其等實質上並非共相位。此等左及、 右頻道本質上係有18〇度的相位偏離然而在非常高頻處 (例如南於1 〇，〇 〇 〇赫茲的頻率以上）以及非常低的頻率處 (例如頻率低於3 0 0赫茲的部份）則在振幅上是相等的。 II.五個電容器的偽立體聲合成器Λ47223 on page 25 V. Description of the invention (21) In this case, the frequency band, ^ ^ The components in the band * are relative to the frequency range components outside the band frequency. 1 ^ ^ L ^. Offense. This has the effect of generating less ring-field gas & + β I in this mid-band frequency and generating more ring-field gas in other frequency ranges. The component of this differential mode signal in the middle range, which is relatively thinner than Α μ & +, &, is attenuated by about 8 dB with respect to the component of the differential mode signal at either side of the center and the surrounding area. This common mode signal generated by such makeup & ta ^ 35 provides little or no ring atmosphere. Min Yu, y. ^ U Here, the components of this common-mode signal within the frequency range are enhanced relative to 奚 # #. His frequency range is enhanced so that when this differential-mode signal Μ2 breaks and merges This synthetic signal J, which gives way outside the mid-band frequency range, has a large ring-field atmosphere. , Yu Yushan λ: An ysr diagram of the left and right channel outputs of this sound enhancement system as shown in the fifth figure. The frequency on the X axis of the plot shown in Figure 9 is in the amplitude of ϊίι / dB. In a specific embodiment, these left wires are substantially co-phased from the & system and substantially at a cross-boat speed of approximately 1,100 hernias. Quality_ Flat QCr〇ss-〇ver frequency ) Is the same as 5 () 8 μ in amplitude. The crossover frequency corresponds approximately to the bandpass filter, the intermediate frequency, and the intermediate frequency of the sharpness filter 504. In its specific embodiment, 'the crossover frequency may fall at approximately 50 Hz to' 〇〇〇 hertz range. In other embodiments, the left and right channels are not substantially co-phased at this spanning frequency. These left and right channels are essentially 180 degrees out of phase, however at very high frequencies (e.g., frequencies above 100,000 Hz) and very low frequencies (e.g., frequencies below 3) 0 0 Hz) is equal in amplitude. II. Pseudo-stereo synthesizer with five capacitors
第26頁 1^· ΑΑΊ223 五、發明說明（22) 此增強系統50 〇可以使用類比訊號處理，數位訊號處 理’或是合併此兩者而予以達成。一增強系統5 〇 〇的一具 趙實踐的實施例’誠如第六圖所示。此一實作使用了較少 的濾波電容器’使得它適合於運用於積體電路。在第六圖 中’此單聲輸入220係提供給一電阻器6〇2的一第一端點。 此電阻器6 0 2的一第二端點則被提供給一接地電阻6 〇 3的一 未接地端以及一緩衝放大器6〇8的一反向輸入。此緩衝放 大器608的一反向輸入係被連接到一接地電阻器的一未 接地端以及一回饋電阻器609的一第一端。此放大器608的 一輸出則是提供給此回饋電阻器609的一第二端。 此放大器6 0 8的一輸出也被提供給此清晰度濾波器5 〇 4 的一輸入。此清晰度濾波器5 0 4輸入則被提供給一電阻器 610的第一端’一電容器612的一第一端，以及一電阻器 614的一第一端。此電容器612的一第二端則提供給一接地 電阻器613的一未接地端以及一電阻器611的一第一端。此 電阻器614的一第二端則是提供給一接地電容器616的一未 接地端以及一電阻器615的一第一端。電阻器615的一第二 端，電阻器611的一第二端，還有電阻器610的一第二端則 是提供給清晰度濾波器5 04的輸出。 此清晰度濾波器5 1 4的輸出則被提供給一電阻器6 1 7的 一第一端（此反向放大器514的輸入）。此電阻器617的一 第二端則提供給一回饋電阻器619的一第一端以及一運算 放大器618的一反向輸入。此運算放大器618的一非反向輸 入則是用來接地，而此運算放大器618的一輸出端則是提Page 26 1 ^ ΑΑΊ223 V. Description of the invention (22) This enhanced system 50 can be achieved by using analog signal processing, digital signal processing 'or a combination of the two. A practical embodiment of a reinforcement system 500 is shown in the sixth figure. This implementation uses fewer filter capacitors' making it suitable for use in integrated circuits. In the sixth figure, this mono input 220 is provided to a first terminal of a resistor 602. A second terminal of the resistor 602 is provided to an ungrounded terminal of a ground resistor 603 and a reverse input of a buffer amplifier 608. A reverse input of the buffer amplifier 608 is connected to an ungrounded terminal of a grounded resistor and a first terminal of a feedback resistor 609. An output of the amplifier 608 is provided to a second terminal of the feedback resistor 609. An output of the amplifier 608 is also provided to an input of the sharpness filter 504. The sharpness filter 504 input is provided to a first terminal of a resistor 610 ', a first terminal of a capacitor 612, and a first terminal of a resistor 614. A second terminal of the capacitor 612 is provided to an ungrounded terminal of a grounded resistor 613 and a first terminal of a resistor 611. A second terminal of the resistor 614 is an ungrounded terminal provided to a grounded capacitor 616 and a first terminal of a resistor 615. A second terminal of the resistor 615, a second terminal of the resistor 611, and a second terminal of the resistor 610 are provided to the output of the sharpness filter 504. The output of the sharpness filter 5 1 4 is supplied to a first terminal of a resistor 6 1 7 (the input of the inverting amplifier 514). A second terminal of the resistor 617 is provided to a first terminal of a feedback resistor 619 and a reverse input of an operational amplifier 618. A non-inverting input of the operational amplifier 618 is used to ground, and an output of the operational amplifier 618 is provided to
第27頁 447223___ 五、發明說明（23) 供給此回饋電阻器619的一第二端。 此運算放大器618的輸出’係此反向放大器方塊514的 輸出，它也被提供到包含有一電阻器625之第一端的加法 器516的一輸入上。此電阻器625的一第二端被提供給一電 阻器626的一第二端’ 一回馈電阻器627的一第一端，以及 一運算放大器628的一反向輸入。此運算放大器628的一輸 出被提供給回饋電阻器627的一第二端以及一右頻道輸出 224 ° 此運算放大器618的輸出也提供給此一包括有一電阻 器620的第一端的加法器512的一輸入。此電阻器620的一 J 第二端則提供給一電阻器621的一第二端，一回饋電阻器 622的一第一端以及一運算放大器624的一反向端。此運算 放大器624的一輸出則被提供到此回饋電阻器622的一第二 端以及一左頻道輸出224。 放大器608的一輸出也提供給包含有電容器635之第一 端的帶通濾波器508的第一端。此電容器635的一第二端則 提供給一接地電阻器6 3 4的一未接地端以及一電阻器6 3 6的 一第一端。電阻器636的一第二端則提供給一接地電容器 637的一未接地端以及一運算放大器6 38的一非反向端。此 運算放大器的638的輸出，也是此帶通濾波器508的一輸 一 出，則提供給一電阻器639的一第一端以及一電阻器640的 一第一端°電阻器64 0的一第二端則提供給一接地電容器 641的一未接地端以及一運算放大器642的一非反向輸入。 電阻器639的一第二端則提供給一電阻器643的一第一端以Page 27 447223___ 5. Description of the invention (23) A second terminal of this feedback resistor 619 is supplied. The output of the operational amplifier 618 is the output of the inverting amplifier block 514, which is also provided to an input of an adder 516 which includes a first end of a resistor 625. A second terminal of the resistor 625 is provided to a second terminal of a resistor 626 ', a first terminal of a feedback resistor 627, and a reverse input of an operational amplifier 628. An output of the operational amplifier 628 is provided to a second terminal of the feedback resistor 627 and a right channel output 224 ° The output of the operational amplifier 618 is also provided to an adder 512 including a first terminal of a resistor 620 One input. A second terminal of the resistor 620 is provided to a second terminal of a resistor 621, a first terminal of a feedback resistor 622, and a reverse terminal of an operational amplifier 624. An output of the operational amplifier 624 is provided to a second terminal of the feedback resistor 622 and a left channel output 224. An output of the amplifier 608 is also provided to a first terminal of a band-pass filter 508 which includes a first terminal of a capacitor 635. A second terminal of the capacitor 635 is provided to an ungrounded terminal of a grounded resistor 6 3 4 and a first terminal of a resistor 6 3 6. A second terminal of the resistor 636 is provided to an ungrounded terminal of a grounded capacitor 637 and a non-inverted terminal of an operational amplifier 638. The output of 638 of this operational amplifier is also an output of the band-pass filter 508, and is provided to a first end of a resistor 639 and a first end of a resistor 640. The second terminal is provided to an ungrounded terminal of a grounded capacitor 641 and a non-inverting input of an operational amplifier 642. A second end of the resistor 639 is provided to a first end of a resistor 643 to
第28頁 447223 五、發明說明（24) 及一運算放大器642的一反向輸入。運算放大器642的一輸 出則提供給回饋電阻器643的一第二端以及一電阻器644的 一第一端。電阻器644的一第二端則提供給一接地電阻器 648的一未接地端。電阻器6 44的第二端係為相位偏移器 510的輸出端，它也被提供給電阻器626的一第一端以及電 端 阻器6 2 1的一第 此等運算放大器608 ’ 618，638及642較佳的是由德州 儀器公司所製造的TL074運算放大器。而運算放大哭62^及 6 2 8較佳的則也是由德州儀器公司所製作的TL 〇 7 2運算放大 器。電阻器的組件（約略是幾千歐母左右）跟如第$圖中 所示的電容器的組件（約略是微法拉）則誠如下表所列。 表一 電阻器 値（約略） ΚΩ 電阻器 値（約略）|電容器 ΚΩ 602 10.0 603 10.0 604 10.0 609 20.0 610 110.0 612 値（約略） 625 620 62 1 622 626Page 28 447223 V. Description of the Invention (24) and an inverting input of an operational amplifier 642. An output of the operational amplifier 642 is provided to a second terminal of the feedback resistor 643 and a first terminal of a resistor 644. A second terminal of the resistor 644 is provided to an ungrounded terminal of a grounded resistor 648. The second terminal of the resistor 6 44 is the output terminal of the phase shifter 510. It is also provided to a first terminal of the resistor 626 and a first such operational amplifier 608'618 of the electric terminal resistor 6 2 1 638 and 642 are preferably TL074 operational amplifiers manufactured by Texas Instruments. The operational amplifiers 62 ^ and 6 2 8 are also preferably TL 0 72 operational amplifiers made by Texas Instruments. The resistor components (approximately a few thousand ohms) and the capacitor components (approximately microfarads) shown in Figure $ are listed in the table below. Table 1 Resistors 値 (approximately) κΩ Resistors 値 (approximately) | Capacitors κΩ 602 10.0 603 10.0 604 10.0 609 20.0 610 110.0 612 约 (approximately) 625 620 62 1 622 626
75.0 61 1 613 47. 3.74 627 634 1.9675.0 61 1 613 47. 3.74 627 634 1.96
第29頁 r 447223 五、發明說明（25) 誠如第六圖所示的α ▲丄 的具體實施例它的優點是它僅使用了 五個濾波電容器，因此社』、^ , 找办奢狀 匕造成它具吸引力的是它可藉積體電 _ 。屬；電各器是困難的被實作在積體電路中。積 访/ ^ Ϊ動態隨機存取記憶體（DRAMs )可以包含上 百i固電夺益’但r此等被使用在drams中的電容器是被 、 7輝存而不是要被當作濾波電容器。因 此，被使用在DRAMs中的電容器其電容值是非常的小，一 般來说會小於80微微-法拉（pic〇_Farads )。相對來說， 被使用在音頻電路中的電容器一般來說是較大的，具有超 過0.1微法拉（micro-Farads)甚或更高的電容值。 由於這些原因’被用作濾波應用的積體電路一般來說 並不使用内部電容器，而是仰賴外部電容器。一般來講， 任一個外部電容器需要至少一個外部的連接處（也就是至 少有一接腳）在積體電路上。因此’所須之濾波電容器的 數目影響了被連接到積體電路上的外部連接處的數目，以 及因之而起的積禮電路的大小及成本。如第六圖所示的電 路其優點在於使用了較少的電容器。 II I.偽立體聲錄製 本發明的具體實施例是可被應用在傳統之立體音響錄 音的回放，或使用在當經由傳統的聲音重現系統的回放而 得提供上述之優點的唯一之立體聲錄製的製作。因此，藉 由於此所揭露的立體聲增強系統2 0 2所提供的增強可以有Page 29 r 447223 V. Description of the invention (25) As shown in the specific embodiment of α ▲ 丄 shown in the sixth figure, its advantage is that it uses only five filter capacitors, so the company ’, ^ What makes it attractive is that it can borrow electricity. It is difficult to implement the electrical components in integrated circuits. Interview / ^ ΪDynamic random access memories (DRAMs) can contain hundreds of solid electricity gains, but these capacitors used in dramas are stored and not used as filter capacitors. Therefore, the capacitors used in DRAMs have very small capacitance values, which are generally less than 80 pico-Farads. Relatively speaking, capacitors used in audio circuits are generally larger, with capacitance values exceeding 0.1 micro-Farads or even higher. For these reasons, integrated circuits used for filtering applications generally do not use internal capacitors but rely on external capacitors. Generally speaking, any external capacitor requires at least one external connection (that is, at least one pin) on the integrated circuit. Therefore, the number of required filtering capacitors affects the number of external connections to be connected to the integrated circuit, and the size and cost of the resulting integrated circuit. The circuit shown in Figure 6 has the advantage of using fewer capacitors. II I. Pseudo-stereo recording The specific embodiments of the present invention are the only stereo recordings that can be applied to the playback of traditional stereo recordings, or used to provide the above advantages when played back via conventional sound reproduction systems Production. Therefore, the enhancement provided by the stereo enhancement system 2 0 2
第30頁 AA7223_ 五、發明說明（26) 助益的被利用來強化錄音。此等錄音可以在一不包含此立 體聲增強系統2 0 2的一音頻系統上來回放，或者是一包括 有此立體聲增強系統2 0 2但卻已經被旁通的音頻系統上播 放。 誠如此處所述的一具有此增強系統2 0 2的一系統，它 包括了一習用的立體聲回放設施，此設施可以用來反應一 數位錄音，例如一雷射影碟，一數位多用途碟片（DVD )，一留聲機錄音，一磁帶錄音，或是在錄影帶或是電影 膠卷上的音轨等。此回放設備提供了左及右頻道立體訊號 L，R ; —放大器則由此將此等左及右訊號饋送到揚聲器 ： 上。 一類似的安排則被使用來製作一錄音，此錄音它本身 會背負一留聲機錄音般的實體溝槽形式的資料，一磁帶或 是相同媒體的磁域，或是可以藉由光學方式而被讀取的數 位資訊。此種資料定義了訊號成分所形成的左及右立體聲 訊號，而當使用習用的音響重現系統回放時，它會產生上 述的所有優點。因此，本發明之用來製作一聲音錄製具體 原理的一錄音系統可以由一麥克風1 0 4或是一傳統的單聲 回放系統，一適宜於被使用在提供一單聲輸入訊號M2 2 0的 系統1 0 8，例如，接收一單聲的輸入訊號。此回放系統 一 1 0 8，可以提供由任何的包括有數位錄音的例如一雷射影 碟，留聲機錄音，磁帶，或是錄影帶或是電影的音軌媒體 所發出的輸出訊號。當第二圖中的此一增強系統2 0 2係被 用來製作一具有強化之環場氣氛的錄音時，此一錄製會與Page 30 AA7223_ V. Description of Invention (26) The benefit is used to enhance the recording. These recordings can be played back on an audio system that does not include the stereo enhancement system 202, or on an audio system that includes the stereo enhancement system 202 but has been bypassed. As described herein, a system with the enhanced system 202 includes a conventional stereo playback facility that can be used to reflect a digital recording, such as a laser disc, a digital versatile disc (DVD), a gramophone recording, a tape recording, or a soundtrack on a video tape or movie film. This playback device provides the left and right channel stereo signals L, R; —The amplifier then feeds these left and right signals to the speaker:. A similar arrangement is used to make a recording, which itself carries data in the form of a gramophone-like solid groove, a magnetic tape or the magnetic domain of the same medium, or can be read optically Taken digital information. This kind of data defines the left and right stereo signals formed by the signal components, and when playing back using a conventional audio reproduction system, it will have all the advantages mentioned above. Therefore, a recording system used to make a sound recording specific principle of the present invention can be a microphone 104 or a conventional mono playback system, which is suitable for being used to provide a mono input signal M2 2 0 The system 108, for example, receives a single input signal. The playback system 108 can provide output signals from any media including digital recording such as a laser disc, gramophone recording, magnetic tape, or video tape or movie track media. When this enhanced system 2 in the second picture is used to make a recording with an enhanced ambient atmosphere, this recording will be related to
第31頁 Λ47223 五、發明說明（27) 一習用的立體聲回放機一起使用以便產生左及右偽立體聲 輸出訊號，而此訊號則具有包含了被提供來當作感受環場 氣氛的一增強訊號。於此所述的此等設施及方法所做的錄 音是可以跟其他的立體聲錄音得以區別的，於此錄音中唯 一的訊號生成資料是被收錄在此錄音之中。在此一唯一的 錄音藉由習用錄製回放媒體來播放時，偽立體聲音響將會 被生成並且具有上述的所有優點，包括所指定的訊號成 分。 I V.其他的具體實施例 前述係揭露了一個實質上用來改善此一出自於一表演J 錄音的環場氣氛以及立體聲印象的系統，而此兩者皆是習 用錄音的回放跟經改良之錄音的重現。此等系統係簡單的 與標準的音頻設備而被利用，並且可以簡單的被附加到現 有的音頻設備上。此外，於此所揭露的系統也可以很簡單 的被併入一前置放大器及/或整合的放大器上。此等之合 作使用也可以包括用來旁通於此所揭露之系統的必需品。 此被揭露的立體聲增強系統係可以簡單的使用類比技 術，數位技術，或是此兩者的合併而予以簡單的實作。此 外，於此所揭露的立體聲增強系統可以積體電路技術而得 以被簡單的實作。 1 還有，於此所揭露的系統也可以與或是被併入一包括 有航空娱樂系統’戲院音響系統中用來產生一包含有印象 強化及/或感知修正之錄音的錄音系統，以及電子音樂樂 器’例如，電子風琴及合成器等的一多變化的音頻系統。Page 31 Λ47223 V. Description of the invention (27) A conventional stereo player is used together to generate left and right pseudo-stereo output signals, and this signal contains an enhanced signal provided to feel the ambient atmosphere. The recordings made by these facilities and methods described here can be distinguished from other stereo recordings. The only signal generation data in this recording is included in this recording. When this only recording is played by conventional recording playback media, pseudo-stereo sound will be generated and have all the advantages mentioned above, including the specified signal component. I V. Other Specific Embodiments The foregoing has disclosed a system that is essentially used to improve the ambient atmosphere and stereo impression of a performance J recording, both of which are playbacks of conventional recordings and improved ones Reproduction of the recording. These systems are simple to use with standard audio equipment and can be easily added to existing audio equipment. In addition, the system disclosed herein can also be easily incorporated into a preamplifier and / or integrated amplifier. These collaborative uses may also include essentials to bypass the systems disclosed herein. The disclosed stereo enhancement system can be implemented simply by using analog technology, digital technology, or a combination of the two. In addition, the stereo enhancement system disclosed herein can be implemented simply by integrating circuit technology. 1 Also, the system disclosed herein may also be incorporated with or incorporated into a recording system including an aeronautical entertainment system 'theatre sound system to produce a recording including impression enhancement and / or perceptual correction, and electronic Musical instruments' such as electronic organs and synthesizers are a variety of audio systems.
第32頁 ^47223 五、發明說明（28) 另外，於此所揭露的系統就汽車音響系統，以及用在 其他的載具，例如，船隻上的音響系統來說將會特別的有 用。 雖然前述已經是本發明的描述或是特定的具體實施例 的舉例，由此而生的各種不同的修改或是變化皆是可以由 熟習此等技藝之人士所達成，然而皆不脫本發明之精神及 藉由下述之申請專利所定義的範圍。Page 32 ^ 47223 V. Description of the Invention (28) In addition, the system disclosed here will be particularly useful for car audio systems and other vehicles, such as audio systems on ships. Although the foregoing is the description of the present invention or an example of a specific embodiment, various modifications or changes resulting therefrom can be achieved by those skilled in the art, but none of them depart from the present invention. The spirit and scope defined by the following patent applications.
第33頁Page 33
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/170,363 US6590983B1 (en) | 1998-10-13 | 1998-10-13 | Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW447223B true TW447223B (en) | 2001-07-21 |
Family
ID=22619579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW088117186A TW447223B (en) | 1998-10-13 | 1999-11-08 | Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US6590983B1 (en) |
| JP (2) | JP4657452B2 (en) |
| CN (1) | CN1146299C (en) |
| AU (1) | AU1102500A (en) |
| TW (1) | TW447223B (en) |
| WO (1) | WO2000022880A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7668722B2 (en) | 2004-11-02 | 2010-02-23 | Coding Technologies Ab | Multi parametrisation based multi-channel reconstruction |
| TWI475896B (en) * | 2008-09-25 | 2015-03-01 | Dolby Lab Licensing Corp | Binaural filters for monophonic compatibility and loudspeaker compatibility |
Families Citing this family (47)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6905686B1 (en) | 1997-12-02 | 2005-06-14 | Neuralab Limited | Active immunization for treatment of alzheimer's disease |
| US7260231B1 (en) * | 1999-05-26 | 2007-08-21 | Donald Scott Wedge | Multi-channel audio panel |
| US7010128B1 (en) | 1999-11-25 | 2006-03-07 | Embracing Sound Experience Ab | Method of processing and reproducing an audio stereo signal and an audio stereo signal reproduction system |
| US7277767B2 (en) | 1999-12-10 | 2007-10-02 | Srs Labs, Inc. | System and method for enhanced streaming audio |
| JP4371622B2 (en) * | 2001-03-22 | 2009-11-25 | 新日本無線株式会社 | Pseudo stereo circuit |
| US6804565B2 (en) * | 2001-05-07 | 2004-10-12 | Harman International Industries, Incorporated | Data-driven software architecture for digital sound processing and equalization |
| US7451006B2 (en) * | 2001-05-07 | 2008-11-11 | Harman International Industries, Incorporated | Sound processing system using distortion limiting techniques |
| US7447321B2 (en) | 2001-05-07 | 2008-11-04 | Harman International Industries, Incorporated | Sound processing system for configuration of audio signals in a vehicle |
| SE0202159D0 (en) * | 2001-07-10 | 2002-07-09 | Coding Technologies Sweden Ab | Efficientand scalable parametric stereo coding for low bitrate applications |
| FR2827734A1 (en) * | 2001-07-17 | 2003-01-24 | Koninkl Philips Electronics Nv | RECEIVER, METHOD, PROGRAM AND TRANSPORT SIGNAL FOR ADAPTING THE SOUND VOLUME OF AN ACOUSTIC CALLING SIGNAL |
| JP3874099B2 (en) * | 2002-03-18 | 2007-01-31 | ソニー株式会社 | Audio playback device |
| EP1585947B1 (en) * | 2002-05-03 | 2020-01-01 | Harman International Industries, Incorporated | Sound detection and localization system |
| US7443987B2 (en) * | 2002-05-03 | 2008-10-28 | Harman International Industries, Incorporated | Discrete surround audio system for home and automotive listening |
| SE527062C2 (en) * | 2003-07-21 | 2005-12-13 | Embracing Sound Experience Ab | Stereo sound processing method, device and system |
| JP2005130322A (en) * | 2003-10-27 | 2005-05-19 | Matsushita Electric Ind Co Ltd | Image sensor noise eliminating device |
| US7522733B2 (en) * | 2003-12-12 | 2009-04-21 | Srs Labs, Inc. | Systems and methods of spatial image enhancement of a sound source |
| JP3985234B2 (en) * | 2004-06-29 | 2007-10-03 | ソニー株式会社 | Sound image localization device |
| TW200627999A (en) | 2005-01-05 | 2006-08-01 | Srs Labs Inc | Phase compensation techniques to adjust for speaker deficiencies |
| US7817812B2 (en) * | 2005-05-31 | 2010-10-19 | Polk Audio, Inc. | Compact audio reproduction system with large perceived acoustic size and image |
| KR100619082B1 (en) | 2005-07-20 | 2006-09-05 | 삼성전자주식회사 | Method and apparatus for reproducing wide mono sound |
| WO2007033150A1 (en) | 2005-09-13 | 2007-03-22 | Srs Labs, Inc. | Systems and methods for audio processing |
| JP4539570B2 (en) * | 2006-01-19 | 2010-09-08 | 沖電気工業株式会社 | Voice response system |
| EP2005787B1 (en) * | 2006-04-03 | 2012-01-25 | Srs Labs, Inc. | Audio signal processing |
| SE530180C2 (en) * | 2006-04-19 | 2008-03-18 | Embracing Sound Experience Ab | Speaker Device |
| US8036902B1 (en) * | 2006-06-21 | 2011-10-11 | Tellme Networks, Inc. | Audio human verification |
| US8050434B1 (en) | 2006-12-21 | 2011-11-01 | Srs Labs, Inc. | Multi-channel audio enhancement system |
| EP2122489B1 (en) * | 2007-03-09 | 2012-06-06 | Srs Labs, Inc. | Frequency-warped audio equalizer |
| KR101298658B1 (en) * | 2007-03-16 | 2013-08-21 | 삼성전자주식회사 | Audio playback device having control function of playback speed and method thereof |
| WO2009102750A1 (en) | 2008-02-14 | 2009-08-20 | Dolby Laboratories Licensing Corporation | Stereophonic widening |
| US20100070550A1 (en) * | 2008-09-12 | 2010-03-18 | Cardinal Health 209 Inc. | Method and apparatus of a sensor amplifier configured for use in medical applications |
| US8000485B2 (en) * | 2009-06-01 | 2011-08-16 | Dts, Inc. | Virtual audio processing for loudspeaker or headphone playback |
| AU2010275711B2 (en) * | 2009-07-22 | 2015-08-27 | Stormingswiss Gmbh | Device and method for improving stereophonic or pseudo-stereophonic audio signals |
| US7880541B1 (en) * | 2009-08-18 | 2011-02-01 | Intersil Americas Inc. | Low noise, low power instrumentation amplifier |
| US8259960B2 (en) * | 2009-09-11 | 2012-09-04 | BSG Laboratory, LLC | Phase layering apparatus and method for a complete audio signal |
| KR101408094B1 (en) * | 2010-02-08 | 2014-06-17 | 한국전자통신연구원 | Subsampling Based Receiver using Frequency Selective Noise Canceller |
| WO2012006770A1 (en) * | 2010-07-12 | 2012-01-19 | Huawei Technologies Co., Ltd. | Audio signal generator |
| CN101894559B (en) * | 2010-08-05 | 2012-06-06 | 展讯通信（上海）有限公司 | Audio processing method and device thereof |
| US8988512B2 (en) * | 2011-04-14 | 2015-03-24 | Mediatek Inc. | Method for adjusting playback of multimedia content according to detection result of user status and related apparatus thereof |
| US9232309B2 (en) | 2011-07-13 | 2016-01-05 | Dts Llc | Microphone array processing system |
| CN102752703A (en) * | 2012-06-28 | 2012-10-24 | 深圳Tcl新技术有限公司 | Mono-channel input and double-channel output method, device and television |
| WO2014190140A1 (en) | 2013-05-23 | 2014-11-27 | Alan Kraemer | Headphone audio enhancement system |
| US9326073B2 (en) * | 2014-04-11 | 2016-04-26 | Qualcomm Incorporated | FM filtering for class-G/H headphones |
| CN104967965B (en) * | 2015-06-29 | 2017-06-30 | 北京芝视界科技有限公司 | A kind of audio play control method and system |
| CN105847454A (en) * | 2016-04-20 | 2016-08-10 | 乐视控股（北京）有限公司 | Signal processing method and device |
| CN109640243A (en) * | 2018-12-06 | 2019-04-16 | 广州番禺巨大汽车音响设备有限公司 | Virtual three-dimensional sound effect processing method and system based on the enhancing of DSP audio |
| CN109922420A (en) * | 2019-04-08 | 2019-06-21 | 北京东奥时代教育科技有限公司 | One kind realizing stereosonic method based on sound channel copy |
| CN115460516A (en) * | 2022-09-05 | 2022-12-09 | 中国第一汽车股份有限公司 | Signal processing method, device, equipment and medium for converting single sound channel into stereo sound |
Family Cites Families (50)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3541266A (en) | 1968-09-30 | 1970-11-17 | Octronix Inc | Bandwidth compressor and expander |
| JPS4959605A (en) * | 1972-10-06 | 1974-06-10 | ||
| US4239939A (en) | 1979-03-09 | 1980-12-16 | Rca Corporation | Stereophonic sound synthesizer |
| JPS5927160B2 (en) * | 1979-06-04 | 1984-07-03 | 日本ビクター株式会社 | Pseudo stereo sound reproduction device |
| JPS56122300A (en) * | 1980-02-29 | 1981-09-25 | Kenkichi Tsukamoto | Method and device for orientating acoustic image of reproduced sound in arbitrary position of space |
| US4308424A (en) | 1980-04-14 | 1981-12-29 | Bice Jr Robert G | Simulated stereo from a monaural source sound reproduction system |
| JPS5738301A (en) * | 1980-08-11 | 1982-03-03 | Seijiro Suda | Generating method for high pressure hydrogen |
| US4394535A (en) | 1981-03-09 | 1983-07-19 | Rca Corporation | Split phase stereophonic sound synthesizer |
| US4479235A (en) | 1981-05-08 | 1984-10-23 | Rca Corporation | Switching arrangement for a stereophonic sound synthesizer |
| US4489432A (en) | 1982-05-28 | 1984-12-18 | Polk Audio, Inc. | Method and apparatus for reproducing sound having a realistic ambient field and acoustic image |
| US4457012A (en) | 1982-06-03 | 1984-06-26 | Carver R W | FM Stereo apparatus and method |
| NL8204980A (en) | 1982-12-24 | 1984-07-16 | Philips Nv | Pseudo-stereo circuit - splits monaural audio signal into two channels by frequency selection by operational amplifiers and filtering |
| DE3331352A1 (en) | 1983-08-31 | 1985-03-14 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Circuit arrangement and process for optional mono and stereo sound operation of audio and video radio receivers and recorders |
| NL8303945A (en) | 1983-11-17 | 1985-06-17 | Philips Nv | DEVICE FOR REALIZING A PSEUDO STEREO SIGNAL. |
| US4496979A (en) | 1983-11-22 | 1985-01-29 | Casat Technology, Inc. | FM High-fidelity processor |
| GB2157475A (en) | 1984-04-12 | 1985-10-23 | Hwang Sung Ting | Audio recording |
| US4594730A (en) | 1984-04-18 | 1986-06-10 | Rosen Terry K | Apparatus and method for enhancing the perceived sound image of a sound signal by source localization |
| JPS6132700A (en) * | 1984-07-25 | 1986-02-15 | Matsushita Electric Ind Co Ltd | Generator of stereo sound field reproducing signal |
| US4594610A (en) | 1984-10-15 | 1986-06-10 | Rca Corporation | Camera zoom compensator for television stereo audio |
| US4706287A (en) | 1984-10-17 | 1987-11-10 | Kintek, Inc. | Stereo generator |
| US4685134A (en) | 1985-07-19 | 1987-08-04 | Rca Corporation | Multichannel computer generated sound synthesis system |
| US4633495A (en) | 1985-07-23 | 1986-12-30 | Recoton Corporation | TV stereo adapter |
| US4748669A (en) | 1986-03-27 | 1988-05-31 | Hughes Aircraft Company | Stereo enhancement system |
| US4972489A (en) * | 1987-02-19 | 1990-11-20 | Matsushita Electric Industrial Co., Ltd. | Sound reproducing apparatus |
| US4836329A (en) | 1987-07-21 | 1989-06-06 | Hughes Aircraft Company | Loudspeaker system with wide dispersion baffle |
| US4819269A (en) | 1987-07-21 | 1989-04-04 | Hughes Aircraft Company | Extended imaging split mode loudspeaker system |
| US4841572A (en) | 1988-03-14 | 1989-06-20 | Hughes Aircraft Company | Stereo synthesizer |
| US4866774A (en) | 1988-11-02 | 1989-09-12 | Hughes Aircraft Company | Stero enhancement and directivity servo |
| US5339363A (en) * | 1990-06-08 | 1994-08-16 | Fosgate James W | Apparatus for enhancing monophonic audio signals using phase shifters |
| US5180999A (en) * | 1990-09-28 | 1993-01-19 | Rockwell International Corporation | Filter system with controlled amplitude in stopband or passband |
| JPH04177999A (en) * | 1990-11-09 | 1992-06-25 | Sony Corp | Stereo circuit |
| CA2056110C (en) | 1991-03-27 | 1997-02-04 | Arnold I. Klayman | Public address intelligibility system |
| US5228085A (en) * | 1991-04-11 | 1993-07-13 | Bose Corporation | Perceived sound |
| US5177329A (en) | 1991-05-29 | 1993-01-05 | Hughes Aircraft Company | High efficiency low frequency speaker system |
| US5251260A (en) | 1991-08-07 | 1993-10-05 | Hughes Aircraft Company | Audio surround system with stereo enhancement and directivity servos |
| JPH05191896A (en) * | 1992-01-13 | 1993-07-30 | Pioneer Electron Corp | Pseudo stereo device |
| US5319713A (en) | 1992-11-12 | 1994-06-07 | Rocktron Corporation | Multi dimensional sound circuit |
| US5333201A (en) | 1992-11-12 | 1994-07-26 | Rocktron Corporation | Multi dimensional sound circuit |
| US5638452A (en) | 1995-04-21 | 1997-06-10 | Rocktron Corporation | Expandable multi-dimensional sound circuit |
| US5661808A (en) | 1995-04-27 | 1997-08-26 | Srs Labs, Inc. | Stereo enhancement system |
| US5850453A (en) | 1995-07-28 | 1998-12-15 | Srs Labs, Inc. | Acoustic correction apparatus |
| JPH0968992A (en) * | 1995-08-31 | 1997-03-11 | Nippon Columbia Co Ltd | Interval controller and musical sound reproducing device |
| US5771295A (en) | 1995-12-26 | 1998-06-23 | Rocktron Corporation | 5-2-5 matrix system |
| EP0808076B1 (en) * | 1996-05-17 | 2007-11-21 | Micronas GmbH | Surround sound system |
| US5870480A (en) * | 1996-07-19 | 1999-02-09 | Lexicon | Multichannel active matrix encoder and decoder with maximum lateral separation |
| US5995631A (en) * | 1996-07-23 | 1999-11-30 | Kabushiki Kaisha Kawai Gakki Seisakusho | Sound image localization apparatus, stereophonic sound image enhancement apparatus, and sound image control system |
| US5784468A (en) | 1996-10-07 | 1998-07-21 | Srs Labs, Inc. | Spatial enhancement speaker systems and methods for spatially enhanced sound reproduction |
| JPH10191203A (en) * | 1996-12-27 | 1998-07-21 | Toshiba Corp | Sound reproduction circuit |
| US5862228A (en) * | 1997-02-21 | 1999-01-19 | Dolby Laboratories Licensing Corporation | Audio matrix encoding |
| US6243476B1 (en) * | 1997-06-18 | 2001-06-05 | Massachusetts Institute Of Technology | Method and apparatus for producing binaural audio for a moving listener |
-
1998
- 1998-10-13 US US09/170,363 patent/US6590983B1/en not_active Expired - Lifetime
-
1999
- 1999-10-05 WO PCT/US1999/023188 patent/WO2000022880A2/en active Application Filing
- 1999-10-05 JP JP2000576672A patent/JP4657452B2/en not_active Expired - Fee Related
- 1999-10-05 AU AU11025/00A patent/AU1102500A/en not_active Abandoned
- 1999-10-05 CN CNB998141682A patent/CN1146299C/en not_active Expired - Lifetime
- 1999-11-08 TW TW088117186A patent/TW447223B/en not_active IP Right Cessation
-
2003
- 2003-06-24 US US10/603,106 patent/US20040005066A1/en not_active Abandoned
-
2009
- 2009-01-14 JP JP2009005859A patent/JP2009141972A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7668722B2 (en) | 2004-11-02 | 2010-02-23 | Coding Technologies Ab | Multi parametrisation based multi-channel reconstruction |
| TWI475896B (en) * | 2008-09-25 | 2015-03-01 | Dolby Lab Licensing Corp | Binaural filters for monophonic compatibility and loudspeaker compatibility |
Also Published As
| Publication number | Publication date |
|---|---|
| US6590983B1 (en) | 2003-07-08 |
| JP2009141972A (en) | 2009-06-25 |
| JP2002528020A (en) | 2002-08-27 |
| CN1329810A (en) | 2002-01-02 |
| US20040005066A1 (en) | 2004-01-08 |
| WO2000022880A2 (en) | 2000-04-20 |
| AU1102500A (en) | 2000-05-01 |
| CN1146299C (en) | 2004-04-14 |
| JP4657452B2 (en) | 2011-03-23 |
| WO2000022880A3 (en) | 2000-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW447223B (en) | Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input | |
| Toole | Sound reproduction: The acoustics and psychoacoustics of loudspeakers and rooms | |
| Snow | Basic principles of stereophonic sound | |
| JP4505058B2 (en) | Multi-channel audio emphasis system for use in recording and playback and method of providing the same | |
| US4239939A (en) | Stereophonic sound synthesizer | |
| JPH0332300A (en) | Environmental acoustic equipment | |
| JP2002159100A (en) | Method and apparatus for converting left and right channel input signals of two channel stereo format into left and right channel output signals | |
| JPH08275300A (en) | Sound field controller | |
| JP6246922B2 (en) | Acoustic signal processing method | |
| JPH07212898A (en) | Voice reproducing device | |
| JPS6198100A (en) | Information encoding signal generator for solid sound | |
| Griesinger | Equalization and spatial equalization of dummy-head recordings for loudspeaker reproduction | |
| JPH04150200A (en) | Sound field controller | |
| KR20120088703A (en) | Phase layering apparatus and method for a complete audio signal | |
| Bartlett | Stereo microphone techniques | |
| KR19980087427A (en) | Sound field correction circuit | |
| US9872121B1 (en) | Method and system of processing 5.1-channel signals for stereo replay using binaural corner impulse response | |
| JP2005535217A (en) | Audio processing system | |
| Malham | Toward reality equivalence in spatial sound diffusion | |
| Geluso | Stereo | |
| JP2000333297A (en) | Stereophonic sound generator, method for generating stereophonic sound, and medium storing stereophonic sound | |
| Novotny | Creating an Immersive Fold-Out: Look Ahead | |
| US5539833A (en) | Audio signal amplifier device | |
| Brandenburg et al. | Audio Codecs: Listening pleasure from the digital world | |
| JP2022128177A (en) | Sound generation device, sound reproduction device, sound reproduction method, and sound signal processing program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GD4A | Issue of patent certificate for granted invention patent | ||
| MM4A | Annulment or lapse of patent due to non-payment of fees |